Long Formal Dresses
Long formal dresses are the ultimate choice for black-tie events, formal dances, and weddings. Choose from mermaid-style, A-line gowns, or modern sheath designs, made with luxurious fabrics like velvet, satin, and glitter mesh. Sequins and rhinestones add a touch of glam, while long sleeves, off-the-shoulder, strapless, and open-back details offer a range of stunning options for any occasion.
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MOST POPULAREmbrace the Season in Stunning Long Formal Dresses for Every Celebration
Embrace the season with Windsor’s captivating collection of long formal dresses, designed to make a statement in the season's most stunning colors. Whether you’re attending a holiday gala, a winter engagement party, or a formal family gathering, find styles that range from sleek mermaid gowns to timeless A-line silhouettes in colors perfect for every occasion.
Explore long formal dresses in vibrant seasonal shades, like deep reds that bring warmth to holiday gatherings, elegant greens that feel festive and classic, and sparkling silvers that add a touch of glamour. For those who love to stand out, rich purples offer a luxurious look, while crisp whites bring a fresh, timeless appeal. Each color adds its own flair to the season, allowing you to embrace the hues that feel most "you."
Our long formal dresses are not only beautiful—they’re designed with comfort and practicality in mind. Many styles feature functional details like side pockets, adjustable straps, and high-quality fabrics that will make these dresses a favorite for seasons to come. Choose from flowing maxis, chic midis, or structured trumpet gowns, all tailored to flatter any figure and suit your unique style.
For added elegance, discover semi-formal dresses featuring unique details like lace-up backs, thigh-high slits, or delicate embroidery in these festive colors—ideal for holiday parties, winter weddings, or upscale dinners.
Complete your look with on-trend necklines such as off-the-shoulder, square, or high necks, and add a touch of sparkle with rhinestone accessories to match any color you choose. Step confidently into every event, knowing you’re dressed to impress.
Browse Windsor’s collection of long formal dresses in all the season’s beautiful colors, available in-store or online, and find pieces that will elevate your wardrobe for every special occasion!
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Elle Formal Sequin Feather Long Dress
Special Occasion
Care to be daring in the Elle formal dress? Go for this show-stopping sequin embellished dress to glow at every holiday party or event! She features a sleeveless plunge V-neckline with a wire insert for a structured fit, feather-trim shoulder straps, and a lightly padded bust. Her form-hugging mermaid silhouette accentuates your curves along her floor-length hem with a sexy high-cut front slit to flaunt some skin. The formal dress is composed of a sequin scroll patterned mesh fabric with a knit lining and minimal stretch. Complete your statement look in a glamorous hair accessory and clutch.
Fit & Features
- Sleeveless plunge V-neckline, wire insert
- Lightly padded bust, bra optional
- Back zipper closure
- Feather trim shoulder straps
- High-cut front slit, mermaid silhouette, floor-length hem
- Sequin scroll pattern mesh, knit lining, minimal stretch
- Runs true to size
Style Number/Barcode: 05002-2554
Category Name: Long Formal Dresses
Price: $119.90
Availability: Out of Stock
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Catrina Formal Satin Sweetheart Dress
Special Occasion
Dreamy silky silk. Catrina embodies effortless grace in her classy sleeveless, sweetheart neckline with shoulder straps and a ruched bust for a playful detail. She features a high waist seam that leads to a form-fitting, mermaid silhouette with a sultry side slit for a show of skin on her floor-length them. The formal dress is composed of a buttery soft satin-lined fabric with plenty of stretch. Complete the look in statement earrings and a sleek clutch.
Fit & Features
- Sleeveless, sweetheart neckline, shoulder straps
- Ruched built-in padded bust, underwire, no bra required
- High waist seam, back zipper closure
- Form-fitting mermaid silhouette
- Front slit, floor-length hem
- Buttery soft satin-lined fabric, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-2265
Category Name: Long Formal Dresses
Price: $19.97 $79.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Jamie Formal Cowl Neck Mermaid Dress
Special Occasion
A dramatic train lends swoon-worthy sultriness to the Jamie formal dress - a stunning option for bridesmaids, banquets, and formal dances! She features a sleeveless cowl neckline, adjustable spaghetti straps, a form-hugging fit with a mermaid silhouette, and backside ruching that leads to her floor-length hem with a train. The formal dress is composed of a sleek knit fabric with a subtle sheen effect. Complete the look in this long dress with earrings and a bracelet.
Fit & Features
- Sleeveless cowl neckline, built-in padded bust
- Adjustable spaghetti straps, back zipper, hook and eye closure
- Form-hugging fit, mermaid silhouette
- Backside ruching, floor-length hem with train
- Sleek knit fabric, lined bust, subtle sheen effect, plenty of stretch
- Bra optional
- Runs true to size
Style Number/Barcode: 05002-6947
Category Name: Long Formal Dresses
Price: $89.90
Availability: In Stock
Available Color: OATMEAL
Available Size: S
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Delia Formal Cowl Neck Long Dress
Special Occasion
Flattery will get you everywhere in the Delia formal long dress crafted from a smooth knit fabric that fits like a glove! Stun at school dances, cocktail soirees, and as a bridesmaid. She features a sleeveless cowl neck with pleating, spaghetti straps that lace up on the back, a mermaid silhouette, and a floor-length hem with a skin-showing front slit. The formal dress is composed of a lined knit fabric with a moderate stretch. Complete the look in a necklace and earrings set.
Fit & Features
- Sleeveless cowl neck, pleating
- Spaghetti straps, lace-up back
- Mermaid silhouette
- High front slit, floor-length hem
- Lined smooth knit fabric, moderate stretch
- Sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-7542
Category Name: Long Formal Dresses
Price: $19.97 $59.90
On Sale: Yes
Availability: Out of Stock
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Vega Formal High Slit Velvet Dress
Special Occasion
Mesmerize in a formal dress that brings the luxe to your evening! Vega features a sleeveless V-neckline, padded cups, bungee spaghetti straps that cross at the back, bungee bar straps, a high side slit, and an A-line silhouette. The dress is composed of a lined velvet fabric that offers a form-hugging fit with a moderate stretch. Complete look with rhinestone heels and a clutch.
Fit & Features
- Sleeveless V-neckline, padded cups
- Bungee spaghetti straps, cross-back
- Bungee bar straps
- High side slit
- A-line silhouette
- Lined velvet fabric
- Form-hugging fit, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1555
Category Name: Long Formal Dresses
Price: $29.97 $54.90
On Sale: Yes
Availability: Out of Stock
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Kelsie Formal Glitter Mermaid Dress
Special Occasion
Light-catching glitter on the Kelsie formal dress creates a dazzling enchantment for your celebration party. She features a sleeveless, sweetheart neck, spaghetti straps, a built-in padded bust with a center front ruched seam atop her corset-style bodice with trim detail. Flaunt your figure in her curve-loving mermaid silhouette that effortlessly flows into the flared floor-length hem. The formal dress is composed of a glitter stretch-knit fabric with an inner knit lining and a moderate stretch. Complete your formal look with a silver clutch and hoop earrings.
Fit & Features
- Sleeveless, sweetheart neck, spaghetti straps
- Built-in padded bust, bra optional
- Center front ruched seam
- Corset-style bodice with trim detail
- Form-fitting, mermaid silhouette, flared floor-length hem
- Glitter stretch-knit fabric, inner knit lining, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-2239
Category Name: Long Formal Dresses
Price: $74.90
Availability: In Stock
Available Color: WHITE, DENIM
Available Size: M, L, XS, S
Product Badge:- Sale
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Ciara Sleeveless Satin Formal Dress
Special Occasion
Sleek and stunning, you'll fall head over heels for the Ciara sleeveless satin formal dress. She features a sweetheart neckline with a cowl neck draped design, padded cups, spaghetti straps, a flattering high waist, and a floor-length fitted silhouette. The smooth satin-knit fabric offers a moderate stretch. Complete your look with sparkling rhinestone heels.
Fit & Features
- Sleeveless sweetheart neckline, cowl neck draped design
- Padded cups
- Spaghetti straps
- High waist seam
- Floor-length fitted silhouette
- Satin-knit fabric, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1659
Category Name: Long Formal Dresses
Price: $19.97 $69.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Clearance
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Evette Glitter One-Shoulder Slit Formal Dress
Special Occasion
Sweet and stunning, the Evette glitter one-shoulder slit formal dress will make a lasting impression throughout the night! She features a sultry knotted one-shoulder strap with a slit accent and seam detailing along the fitted empire waist. Flaunt your curvy figure and show some leg in her form-fitting maxi silhouette with high-side slit detail. This formal dress is composed of a textured glitter knit-lined fabric with a moderate stretch. Complete the look in a rhinestone tiara.
Fit & Features
- One-shoulder, knotted slit strap
- Adhesive bra recommended
- High side slit
- Empire waist
- Bodycon silhouette, floor-length hem
- Textured glitter-knit fabric, skirt lining
- Form-hugging fit, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1882
Category Name: Long Formal Dresses
Price: $9.97 $54.90
On Sale: Yes
Availability: Out of Stock
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Whitney Formal High-Slit Mermaid Dress
Special Occasion
Bring the elegance to your look with a formal dress that wows! The dress features a sleeveless V-neckline with padded cups, spaghetti straps, a lace-up back, a high side slit with a ruched drawstring, and a mermaid silhouette. The dress is composed of a smooth knit fabric that offers a form-hugging fit with a moderate stretch. Complete look with a rhinestone anklet and glitter heels.
Fit & Features
- Sleeveless V-neckline, padded cups
- Bungee spaghetti straps
- Lace-up back design
- High side slit with ruched drawstring
- Mermaid silhouette
- Knit fabric, short knit lining, form-hugging fit, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1493
Category Name: Long Formal Dresses
Price: $39.97 $74.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Christina Lace-Up Back Velvet Dress
Special Occasion
Make a dramatic entrance at your next soiree in the chic Christina velvet formal long dress. She features a sleeveless square neckline, thin shoulder straps, an open back with a cross-back lace-up strappy design, a fitted, floor-length silhouette, and a sultry thigh-high front slit. Add some sparkle with rhinestone earrings and complete the look with a sleek clutch.
Fit & Features
- Sleeveless square neckline, thin shoulder straps
- Padded bust, no bra required
- Open back, cross-back lace-up strappy design
- Lower back zipper and hook and eye closure
- Fitted, floor-length silhouette, high front slit
- Velvet fabric, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1552
Category Name: Long Formal Dresses
Price: $14.97 $69.90
On Sale: Yes
Availability: Out of Stock
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Shay A-Line Tulle Formal Dress
Special Occasion
Make a breathtaking entrance at prom in the whimsical Shay A-line tulle formal dress! With her lightweight, flowy, A-line silhouette, you'll radiate beauty with every step. She features a sleeveless plunging V-neckline, adjustable spaghetti straps for a customized fit that lead to a cross-back design, and a high empire waist. Her floor-length sheer mesh skirt flows out with chic pleated detailing and features a knit lining with a wrap-front design creating a high slit. Style this dress with sparkling rhinestone earrings to bring the princess vibes to this prom season.
Fit & Features
- Plunge V-neckline, adjustable spaghetti straps
- Adhesive bra recommended
- Open cross-back design, zipper and hook and eye closure
- Empire waist, floor-length A-line silhouette
- Wrap-front design, high slit
- Tulle fabric, inner knit lining
- Flowy relaxed fit, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1985
Category Name: Long Formal Dresses
Price: $19.97 $54.90
On Sale: Yes
Availability: Out of Stock
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Lia Ruched Satin High Slit Formal Dress
Special Occasion
Sleek and stunning, the Lia satin long formal dress is a gorgeous choice for weddings or fancy parties. She features a sleeveless square neckline, thin tank shoulder straps, front seam detailing creating a corset-like waistband, ruching down the side leading to a thigh-high slit, and a floor-length hem with a form-hugging silhouette. The satin-knit fabric showcases a stunning sheen and offers a moderate stretch. Style your look with this long dress with a rhinestone clutch.
Fit & Features
- Sleeveless square neckline, tank shoulder straps
- Front seam detailing, back zipper closure
- Ruching down the side, high side slit
- Floor-length hem, form-hugging fit
- Satin-knit fabric, knit lining at the top, moderate stretch
- Strapless or sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-7459
Category Name: Long Formal Dresses
Price: $9.97 $64.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Bebe Formal Glitter Wrap Dress
Special Occasion
Wrap yourself in a glam formal dress that instantly brings the glamour to homecoming or galas! The dress features an off-the-shoulder neckline with subtle pleats, a sweetheart bust, and a wrap silhouette with a high side slit. The dress is composed of a glitter knit fabric that offers a form-hugging fit with a moderate stretch. Complete look with rhinestone earrings.
Fit & Features
- Off-the-shoulder neckline
- Pleat detailing
- Sweetheart bust
- Wrap silhouette, high side slit
- Form-hugging fit, floor-length hem
- Glitter knit, moderate stretch
- Runs true to size
The saturation of glitter varies. Glitter may transfer.
Style Number/Barcode: 05002-7456
Category Name: Long Formal Dresses
Price: $9.97 $64.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Anastasia Velvet Formal Dress And Gloves Set
Special Occasion
You'll be red carpet ready and radiating glamour in the Anastasia velvet formal dress and gloves set! She features a strapless sweetheart neckline with a fitted bodice, flexible boning to provide structure, pleated detailing at her slim-fit waist, a floor-length asymmetrical hem creating a dramatic thigh-high side slit, and a curve-hugging silhouette. The matching gloves feature a long-fitted design to amp up the elegance. The luxe velvet fabric offers a moderate stretch. Complete your outfit with rhinestone duster earrings and an embellished cuff.
Fit & Features
- Strapless sweetheart neckline, fitted bodice, flexible boning
- Slim-fit waist, front pleating, back zipper closure
- Floor-length asymmetrical hem, high side slit, curve-hugging silhouette
- Matching long-fitted gloves
- Velvet fabric, full knit lining, moderate stretch
- Strapless or sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-3287
Category Name: Long Formal Dresses
Price: $24.97 $74.90
On Sale: Yes
Availability: Out of Stock
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Raquel Formal Sequin Mermaid Dress
Special Occasion
Glistening sequins dance across the Raquel formal dress to make a stunning appearance at dances, weddings, and banquets! She features a sleeveless sweetheart neckline, spaghetti straps that lace up on the back, a built-in padded bust with underwire, and a form-hugging mermaid silhouette with a sultry front slit and floor-length hem. The formal dress is composed of a sequin-embroidered mesh fabric with a stretchy knit lining. Style with a collar necklace and heels to complete the look!
Fit & Features
- Sleeveless sweetheart neckline, spaghetti straps
- Lace-up back, zipper and hook-eye closure
- Built-in padded bust, underwire
- Form-hugging, mermaid silhouette, front slit, floor-length hem
- Sequin-embroidery, mesh fabric, stretchy knit lining
- No bra required
- Runs true to size
Style Number/Barcode: 05002-6926
Category Name: Long Formal Dresses
Price: $19.97 $109.90
On Sale: Yes
Availability: Out of Stock
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Cassia Formal Open-Back Velvet Dress
Special Occasion
Make a luxe entrance with a formal dress that brings elegance to your special evening! Cassia features a sleeveless V-neckline with a built-in bust, bungee spaghetti straps, ruching, and an A-Line silhouette with a high-side slit. The back features an open-back design with a slide hook closure at the center and ruching at the lower back. The dress is composed of a velvet fabric that offers a moderate stretch. Complete look with rhinestone heels.
Fit & Features
- Sleeveless, V-neckline, bungee spaghetti straps
- Built-in padded bust
- Open-back, ruching, slide-hook and zipper closure
- A-Line silhouette, high-cut slit
- Floor-length hem
- Velvet fabric, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1551
Category Name: Long Formal Dresses
Price: $14.97 $69.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Clearance
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Ilya Satin Backless Mermaid Dress
Special Occasion
Catch everyone's gaze in the daring Ilya formal satin dress! She features a sleeveless square neckline, spaghetti straps, an alluring open back with a cross-back strap design, and a cowl-draped detail at the lower back. Her slim-fit bodice leads to a floor-length hem with a fitted mermaid silhouette and a sultry high front slit to showcase some leg. The smooth satin-knit fabric offers a moderate stretch. Style the long dress with rhinestone heels.
Fit & Features
- Sleeveless square neckline, spaghetti straps
- Open back, cross-back strap design
- Cowl draped design at the lower back
- High waist seam, slim-fit bodice
- Floor-length hem, mermaid silhouette, high front slit
- Satin-knit fabric, knit lining at the bust
- Sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-7403
Category Name: Long Formal Dresses
Price: $69.90
Availability: In Stock
Available Color: BROWN
Available Size: XS, S, M, L
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Beka Mesh And Heat Stone High Slit Dress
Special Occasion
Make an extravagant entrance and bring the drama in our stunning Beka formal dress! She features a front heat stone embellished sheer mesh insert with a mock neck and a plunging V neckline, a back zipper closure, and long fitted sleeves with heat stone details and chic feather hems. Her form-hugging silhouette leads to a floor-length skirt with a sexy high slit and a heat stone adorned mesh insert. Complete your luxe look with strappy stilettos and a sparkly clutch.
Fit & Features
- Mock neck and plunging V neckline
- Sheer mesh insert with heat stone applique
- Back zipper closure
- Long fitted sleeves with heat stone details and feather hems
- High slit with heat stone adorned mesh insert
- Floor-length curve-hugging fit
- Crepe fabric with a mini-length lining
Style Number/Barcode: 05002-0722
Category Name: Long Formal Dresses
Price: $14.97 $89.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Kelly Formal Glitter Cowl Neck Dress
Special Occasion
The night is sparkling and you'll never want it to end in the stunning Kelly formal dress showcasing a display of glitter that the light loves to glisten! She features long sleeves, a cowl neckline, an empire waist, and a form-hugging silhouette with a sexy high-cut side slit along her long hem. The formal dress is composed of a glitter knit fabric with a short knit lining and moderate stretch. Complete your wedding guest, fall banquet, or charity ball look in statement earrings and heels.
Fit & Features
- Long sleeves, cowl neckline, empire waist
- Bra-friendly design
- Form-hugging silhouette
- High-cut side slit
- Long-length hem
- Glitter knit fabric, short knit lining, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-2516
Category Name: Long Formal Dresses
Price: $14.97 $69.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Clearance
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Cathy Formal Metallic Wrap Dress
Special Occasion
Wrap yourself with dazzling shine as you captivate them all in our Cathy dress! She features a sleeveless wrap V-neckline, spaghetti straps, ruching, a high off-center slit that shows off plenty of leg, and a wrap silhouette that embraces curves. The dress is composed of a glitter lurex fabric that offers a form hugging fit with a moderate stretch. Complete look with chrome heels.
Fits & Features
- Sleeveless wrap V-neckline
- Spaghetti straps
- Ruching, high off-center slit
- High waist, wrap silhouette
- Metallic glitter lurex fabric
- Form hugging fit, moderate stretch
- Runs true to size
The saturation of glitter varies. Glitter may transfer.Style Number/Barcode: 05002-0366
Category Name: Long Formal Dresses
Price: $14.97 $49.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Jovie Formal Sequin Slit Mermaid Long Dress
Special Occasion
To sparkle is always the answer to the Jovie formal dress covered in head-to-toe sequins to make your dazzling entrance! Perfect for school dances, black tie weddings, and dressy celebrations. She stuns in a sleeveless square neckline, tank-style straps, and a form-hugging mermaid silhouette that creates the high-cut front slit along her floor-length hem. The formal dress is composed of a sequin-embroidered fabric with a lining. Complete the look in platform heels.
Fit & Features
- Sleeveless square neck, tank-style straps
- Back zipper and hook-eye closure
- Form-hugging, mermaid silhouette
- High-cut front slit, floor-length hem
- Sequin-embroidered fabric, stretchy knit lining
- Lightly padded bust, bra optional
- Runs true to size
Style Number/Barcode: 05002-2844
Category Name: Long Formal Dresses
Price: $49.97 $109.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Clearance
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Ashley Sleeveless Bow Mermaid Formal Dress
Special Occasion
Both feminine and sweet, the Ashley sleeveless bow mermaid formal dress offers a flattering fit and look that'll have you feeling like a princess! Crafted with smooth knit fabric with lining, this dress is both elegant and comfortable for bridesmaids, wedding guests, or banquet dinners. Her cowl neckline, adjustable spaghetti straps, and crisscross back add a touch of sophistication. The back bow tie design and ruched seam create a flattering mermaid silhouette, while the high front slit and floor-length hem add a sense of drama. Complete the look in an elegant necklace and ring set.
Fit & Features
- Smooth knit stretchy fabric, stretchy knit lining
- Adjustable spaghetti straps, crisscross back
- Back bow tie design, zipper and hook-eye closure
- High front slit
- Mermaid silhouette
- Sticky bra or pasties recommended
- Runs true to size
Style Number/Barcode: 05002-8290
Category Name: Long Formal Dresses
Price: $69.90
Availability: In Stock
Available Color: NAVY, HUNTER
Available Size: S, XS, M, L
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Nemi Formal High Slit Ruched Dress
Special Occasion
Create a mesmerizing impression with an elegant formal dress that captivates! Nemi features a sleeveless cowl neckline, padded cups, corset seams at the bodice, flexible boning, and ruching. Her slim fit bodice leads to a mermaid silhouette accented with a high side slit. Nemi is composed of satin fabric that offers a form hugging fit with minimal stretch. Complete look with rhinestone heels and a tennis bracelet.
Fit & Features
- Sleeveless cowl neckline
- Padded cups, adjustable spaghetti straps
- Corset seams at bodice, flexible boning
- Ruching
- Mermaid silhouette, high side slit
- Satin fabric
- Form hugging fit, minimal stretch, runs true to size
Style Number/Barcode: 05002-1294
Category Name: Long Formal Dresses
Price: $19.97 $74.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Clearance
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Gwendolyn Cross-Back Sequin Dress
Special Occasion
Let our beautiful Gwendolyn do all the talking this prom season! Her stunning sequins and gorgeous silhouette are enough to spark a conversation everywhere you go. She features a sleeveless wired deep V-neckline with a padded bust, dual adjustable spaghetti straps that lead to a cross-back design, and a floor-length, form-hugging fit. The lined mesh fabric features all-over sequin embroidery in a chic scroll pattern. Complete your prom look with rhinestone earrings.
Fit & Features
- Sleeveless bodice, plunging wired V-neckline, padded bust
- Dual adjustable spaghetti straps, cross-back design
- Back zipper and hook and eye closure
- Floor-length, form-fitting silhouette
- Lined mesh fabric, moderate stretch
- Sequin embroidery, scroll pattern
- Runs true to size
Style Number/Barcode: 05002-0564
Category Name: Long Formal Dresses
Price: $19.97 $89.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Clearance