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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Sam Formal Satin Open Back Dress
Special Occasion
Slip into this silky satin number! Sam is here for you and your next dressy affair. She features a sleeveless, plunging V-neckline, a built-in padded bust, and wide shoulder straps that lead to her open-back design with lace-up straps, a zipper closure, and bum ruching. Her form-fitting, A-line silhouette hugs your curves while the side slit accent lets you showcase some leg on the floor-length hem. The formal dress is composed of a luxe satin-stretch fabric with lining. Complete the look with an elegant hair comb to tame your tresses in style.
Fit & Features
- Sleeveless, plunging V-neckline, wide shoulder straps
- Open-back, lace-up straps, zipper and hook and eye closure, bum ruching
- Form-fitting, A-line silhouette
- Side slit accent, floor-length hem
- Satin-stretch fabric, lined
- No bra required, built-in padded bust
- Runs true to size
Style Number/Barcode: 05002-8450
Category Name: Long Formal Dresses
Price: $89.90
Availability: In Stock
Available Color: NAVY
Available Size: 5, 7, 9
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Savannah Formal Crepe Long Dress
Special Occasion
Stunning for brides and celebrations, the Savannah formal crepe dress showcases simplicity and elegance! She features a classic sleeveless square neckline, tank-style straps, a form-hugging silhouette, and a sultry front high-cut slit along the floor-length hem. The long formal dress is composed of a stretch crepe-lined fabric. Style with a glamorous necklace and earrings set to complete the look!
Fit & Features
- Sleeveless square neckline, tank-style straps
- Back zipper and hook-eye closure
- Form-hugging silhouette
- Front high-cut slit
- Floor-length hem
- Lined crepe fabric, moderate stretch
- Strapless or sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-6919
Category Name: Long Formal Dresses
Price: $49.90
Availability: In Stock
Available Color: BLACK, RED
Available Size: XS, S, M, L
Product Badge:- Best Seller
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Celina Glitter Knit Mermaid Dress
Special Occasion
Turn heads and make a sparkly statement in the stunning Celina dress! She features a sleeveless cowl neckline, spaghetti straps that lead to a cross-back design, front ruched detailing, and a floor-length mermaid silhouette with a thigh-high slit. Complete the look with rhinestone statement earrings and chic heels.
Fit & Features
- Sleeveless cowl neckline
- Spaghetti straps, cross-back design
- Front ruching
- Floor-length mermaid silhouette, high front slit
- Curve-hugging fit
- Glitter knit fabric, short knit lining, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1718
Category Name: Long Formal Dresses
Price: $19.97 $59.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Jolina Wrap Skirt Satin Dress
Special Occasion
Show off your fab figure by slipping into our gorgeous Jolina! Her pretty sheen will have you radiating from every angle, making you look picture-perfect and camera-ready. She features a sleeveless wrap-front V-neckline and a floor-length wrap skirt creating an alluring front slit. Pair her up with some sparkling finishing touches so you can highlight that glow even more!
Fit & Features
- Surplice V-neckline, adjustable spaghetti straps
- Floor-length hem, wrap skirt design
- Front slit
- Lined luxe satin fabrication
- Form-hugging fit, moderate stretch
- Sticky or strapless bra recommended
- Runs true to size
Style Number/Barcode: 05002-0761
Category Name: Long Formal Dresses
Price: $44.90
Availability: In Stock
Available Color: HUNTER
Available Size: S, M
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Arabella High Slit Cowl Neck Dress
Special Occasion
Radiate elegance in this long formal dress made with a high-shine, smooth fabric. Designed to hug your curves, this floor-length bodycon dress accentuates an hourglass figure for a simply irresistible look. A sultry side slit elegantly elongates the legs, while the dress impresses from every angle with its low-back design. The flattering cowl neckline at the front creates the perfect display for a sparkly rhinestone necklace so your gorgeous selfies pop and shine.
Fits & Features
- Sleeveless cowl neckline, spaghetti straps, cross at back
- A-line silhouette, ruched detailing
- High side slit
- Smooth knit fabric
- Form-hugging fit, moderate stretch
- Sticky bra or pasties recommended
- Runs true to size
Style Number/Barcode: 05002-3012
Category Name: Long Formal Dresses
Price: $46.90
Availability: In Stock
Available Color: PURPLE
Available Size: XS, S
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Abigail Ruched Satin Mermaid Dress
Special Occasion
Get a stunning look in the gorgeous and chic Abigail mermaid dress! She features a sleeveless bodice, adjustable spaghetti straps that lead to a cross-back design, a V-neckline, and a sheer lace back panel with zipper closure. Her high waist leads to a curve-hugging mermaid silhouette with a floor-length skirt, front ruched detailing, and a thigh-high front slit. Pair the sleek satin dress with a rhinestone collar necklace and strappy heels.
Fit & Features
- Sleeveless V-neckline, adjustable spaghetti straps
- Back zipper and hook and eye closure, sheer lace panel, cross straps
- Ruched detailing on bodice and waist, thigh-high slit
- Form-fitting long hem, mermaid silhouette
- Luxe satin knit fabrication
- Form-hugging fit, moderate stretch
- Sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-1198
Category Name: Long Formal Dresses
Price: $29.97 $69.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Taisia Formal Sequin Scroll Dress
Special Occasion
Lace up in a formal dress that brings the shimmer to your special night. The Taisia dress features a plunging V-neckline, an open lace-up back, a lightly padded bust, and a curve-hugging mermaid silhouette and floor-length hem. The formal dress is composed of a sequin scroll pattern on mesh fabric with a stretchy knit lining. Complete your look with a chiffon wrap and heels.
Fit & Features
- Sleeveless V-neckline, bungee spaghetti straps
- Lightly padded bust
- Open lace-up back, zipper, and hook-eye closure
- Form-hugging, mermaid silhouette, floor-length hem
- Sequin scroll mesh fabric, stretchy knit lining
- Sticky bra optional
- Runs true to size
Style Number/Barcode: 05002-0245
Category Name: Long Formal Dresses
Price: $77.00 $109.90
On Sale: Yes
Availability: In Stock
Available Color: HUNTER
Available Size: XS, S, M
Product Badge:- Sale
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Nala Cowl Neck Satin Dress
Special Occasion
Cue the fireworks, you're here to make an entrance in the stunning Nala formal dress! She features a sleeveless bodice with a trendy cowl neckline, spaghetti straps, a high waist seam to elongate your silhouette, and a floor-length mermaid fit that will hug your curves. The sleek satin fabric offers plenty of stretch. Complete your gorgeous going-out look with strappy heels and a chic clutch.
Fit & Features
- Cowl neckline, spaghetti straps
- Strapless or adhesive bra recommended
- High waist seam
- Mermaid floor-length silhouette
- Luxe satin fabric
- Form-hugging fit, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-0700
Category Name: Long Formal Dresses
Price: $19.97 $54.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Mayven One-Shoulder Cutout Slit Formal Dress
Special Occasion
The Mayven formal dress brings sultry, sophistication to every event! She features a one-shoulder strap design with an alluring neck cutout detail on the fitted bodice. The empire waist flows into her floor-length silhouette and flaunts some skin with a sexy high-cut slit. Composed of a crepe knit fabric with a moderate stretch. Create the perfect look in this long dress with lace-up heels and a sparkly necklace.
Fit & Features
- One-shoulder strap design, neck cutout detail
- Empire waist, high-cut slit
- Floor-length hem
- Lined crepe knit fabric
- Form-hugging fit, moderate stretch
- Strapless or sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-1881
Category Name: Long Formal Dresses
Price: $9.97 $44.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Bethanie Formal Sequin V-Neck Mermaid Dress
Special Occasion
Embellished with light-catching sequins, the Bethanie formal dress is a clear stunner for prom or red-carpet events! She features a sleeveless V-neckline with a padded bust eliminating the need for a bra, spaghetti straps, a lace-up back, and a flattering mermaid silhouette with a floor-length hem. The formal dress is composed of a sequin-scroll pattern on mesh fabric with a stretchy knit lining. Complete your dressy look with earrings and a bracelet for extra glimmer!
Fit & Features
- Sleeveless V-neckline, padded bust
- Lace-up back, zipper and hook-eye closure
- Mermaid silhouette
- Floor-length hem
- Sequin-scroll pattern, mesh fabric, stretch knit lining
- Bra optional
- Runs true to size
Style Number/Barcode: 05002-3948
Category Name: Long Formal Dresses
Price: $109.90
Availability: In Stock
Available Color: PINK, ROYAL, PLUM, YELLOW
Available Size: L, M, XS, S
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Mara Crepe One Shoulder Gown
Special Occasion
Turn heads from every angle in a homecoming dress like the sleekly stunning Mara gown. She features a dramatic single-shoulder seamed bodice with scalloped lace insets at the back and waist, a side zip, and a body-hugging slim skirt that pools gently at the hem. Mara is made from a crepe material with moderate stretch. Complete the look with a rhinestone clutch and a faux fur wrap.Fit & Features
- One-shoulder neckline
- Scalloped lace inserts
- Sheer back
- A-line silhouette
- Lined crepe fabric
- Form hugging fit, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-6731
Category Name: Long Formal Dresses
Price: $19.97 $49.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Meryl Formal Glitter Long Dress
Special Occasion
Stand out from the crowd in the shimmering Meryl glitter long dress sure to sparkle all night. She's prom-perfect and ready to stun in her alluring off-the-shoulder neckline atop a fitted bodice. Her high waist seam leads to a side ruched detail with a sultry side slit for showcasing some leg on a mermaid silhouette. The formal dress is composed of a glitter-knit lined fabric with a moderate stretch. Complete the look in an elegant hairpiece to tame your tresses in style.
Fit & Features
- Sleeveless, off-the-shoulder neckline
- Fitted bodice, high-waist seam
- Side ruched detail, slit accent
- Mermaid long silhouette
- Glitter-knit lined fabric, moderate stretch
- Strapless bra or sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-2126
Category Name: Long Formal Dresses
Price: $69.90
Availability: In Stock
Available Color: BLACK, RED, DENIM
Available Size: XS, S, M, L, XL
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Azalea Formal High Slit Sequin Dress
Special Occasion
Showcase your show-stopping looks in the gorgeous Azalea sequin dress. She features a sleeveless bodice, spaghetti straps, a trendy square neckline with padding, a no-slip strip, and a backless design with a lace-up accent. Her high waist seam leads to a floor-length, curve-hugging mermaid silhouette with a high slit for a chic factor. The dress is composed of a lined mesh fabric with an all-over intricate sequin design and includes a stretchy knit lining. Complete your outfit with radiant earrings and a rhinestone cuff.
Fit & Features
- Spaghetti straps
- Square neckline with padding
- Open back with a lace-up design
- Lower back zipper and hook and eye closure
- Floor-length, form-hugging mermaid fit, high side slit
- Mesh fabric with a knit lining, all-over sequin pattern
- Form-hugging fit, moderate stretch
- Runs true to size
Style Number/Barcode: 05002-1384
Category Name: Long Formal Dresses
Price: $89.90
Availability: In Stock
Available Color: BLACK
Available Size: S, M, L
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Heidi Formal Lattice Dress
Special Occasion
Allure them in the chic Heidi dress to make a head-turning impression at your next special event. The formal dress features a sleeveless plunging V-neckline, a built-in padded bust for comfortable support, and dual spaghetti straps. The straps lead to a bold open back to show off a hint of skin and sleek lattice straps that let you adjust the fit. The bodice of the dress leads to a floor-length mermaid silhouette that is complemented with vertical seams to streamline your shape. Complete your outfit with rhinestone earrings and strappy stilettos.
Fit & Features
- Sleeveless V-neckline, dual spaghetti straps
- Built-in padded bust, adhesive bra recommended
- Open back, lattice design, tie closure
- Empire waist, vertical seams
- Floor-length mermaid silhouette
- Luxe satin-lined fabric
- Moderate stretch
- Runs true to size
Style Number/Barcode: 05002-6105
Category Name: Long Formal Dresses
Price: $29.97 $59.90
On Sale: Yes
Availability: Out of Stock
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Haisley Formal Tulle And Satin Dress
Special Occasion
Create a breathtaking entrance in our Haisley dress as you captivate with magical tulle and stunning satin! She features a sleeveless satin bodice, plunge V-neckline, adjustable spaghetti straps that shape the strappy back design, and an airy A-line tulle silhouette with a floor-length hem and high-front slit. The formal dress is composed of a stretchy lined satin and tulle fabric. Complete the look with rhinestone earrings and a clutch for a formal dinner party or wedding!
Fit & Features
- Plunging V-neckline, adjustable spaghetti straps
- Strappy back design, lower zipper and hook-eye closure
- Satin bodice, A-line tulle silhouette
- Floor-length hem
- Stretchy knit lining with a front high slit
- Sticky bra or pasties recommended
- Runs true to size
Style Number/Barcode: 05002-0152
Category Name: Long Formal Dresses
Price: $9.97 $44.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Maddison Sleeveless Mermaid Dress
Special Occasion
Stun in a formal mermaid dress that radiates elegance and grace. Captivate with a sleek, timeless style for your next special event in a dress that brings glamour. The Maddison formal dress features an off-the-shoulder neckline with a fold-over accent and vertical princess seams at the bust that provides structure. The relaxed fit bodice leads to a curve-hugging mermaid silhouette that flatters curves by creating an hourglass illusion. Complete your elegant formal outfit with a rhinestone hair clip to create a gorgeous updo and a sleek envelope clutch.Fits & Features
- Fold-over off-the-shoulder neckline
- Strapless adhesive bra recommended
- Mermaid silhouette, princess seams
- Curve-hugging fit
- Back zipper closure
- Crepe-lined fabric, moderate stretch
- Fits true to size
Style Number/Barcode: 05002-5415
Category Name: Long Formal Dresses
Price: $14.97 $49.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Kaliyah Formal High Slit Lurex Dress
Special Occasion
Dazzle and shimmer in this off-the-shoulder gown for your next formal event. Make a stunning entrance in this floor-length A-line dress with shimmery lurex fabric that wraps perfectly around the waist in a surplice off-the-shoulder bodice. Indulge in a twirly-worthy moment in this A-line-shaped skirt accented with a side high slit detail for a flirty reveal of your gorgeous legs. Complete your formal look with sparkly rhinestone jewelry and matching glitter heels for the perfect finishing touches.
Fit & Features
- Off-the-shoulder neckline
- Wrap-style bust
- Strapless or adhesive bra recommended
- High side slit
- A-line silhouette
- Glitter Lurex knit fabric
- Runs true to size
Style Number/Barcode: 05002-0060
Category Name: Long Formal Dresses
Price: $70.00 $99.90
On Sale: Yes
Availability: In Stock
Available Color: GOLD
Available Size: XS, S
Product Badge:- Sale
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Leann Formal High Slit Glitter Dress
Special Occasion
Shine for those special moments in our twinkling Leann dress! She features a sleeveless bodice, a wrap V-neckline, and narrow cross straps. Her slim-fit bodice leads to a curve-hugging floor-length silhouette accented with a ruched side seam and a high side slit. The dress is composed of a glitter knit fabric that offers a form-hugging fit with a moderate stretch. Complete the look with rhinestone heels and a satin clutch.Fit & Features
- Sleeveless, V-neckline, spaghetti straps
- Adhesive bra recommended
- Criss-cross back
- Ruching, high side slit, slim-fit silhouette
- Glitter knit fabric, moderate stretch
- Saturation of glitter varies and may transfer
- Runs true to size
Style Number/Barcode: 05002-1536
Category Name: Long Formal Dresses
Price: $29.97 $64.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Amirah Formal Glitter Cowl Neck Long Dress
Special Occasion
Look your best for a fancy night in the stunning Amirah formal glitter dress! Fashioned with an eye-catching cowl neckline, adjustable spaghetti straps, and a beautiful cross back, this dress will make you feel like the star of the evening. Its slim-fit silhouette is complemented with a high front slit and side pleated seam for added allure, and the glitter knit fabric ensures you will be making a statement. Complete the look with earrings and strappy lace-up heels.
Fit & Features
- Sleeveless cowl neckline
- Spaghetti straps, cross back
- Side pleated seam, slim silhouette, high front slit
- Floor-length hem
- Glitter knit fabric, moderate stretch
- Strapless bra recommended
- Runs true to size
Style Number/Barcode: 05002-7561
Category Name: Long Formal Dresses
Price: $59.90
Availability: In Stock
Available Color: BLACK
Available Size: XS, S, M, L, XL
Product Badge:- Best Seller
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Rochelle Formal Fantasy Mermaid Dress
Special Occasion
Keep it radiant in the Rochelle dress! Make a sensational entrance at your next special event in this formal crepe dress featuring a stunning off-the-shoulder neckline with a sweetheart bust that cascades off the shoulders, and a built-in bust for support. The vertical seams on the bodice create a streamlined look on the flared mermaid silhouette that highlights curves to create an hourglass effect. Complete your formal outfit with rhinestone heels and a sleek satin clutch.
Fit & Features
- Off-shoulder sweetheart neckline, short-sleeve cuffs
- Built-in padded bust, adhesive bra recommended
- Vertical seams, mermaid silhouette
- Back zipper closure
- Form-hugging style
- Crepe-lined fabric, moderate stretch
- Fits true to size
Style Number/Barcode: 05002-5841
Category Name: Long Formal Dresses
Price: $19.97 $79.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Clearance
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Larsa Formal Velvet And Lace Mermaid Dress
Special Occasion
Radiate elegance in our luxe Larsa formal mermaid dress! She features an off-the-shoulder neckline with a sweetheart bust, long fitted sheer lace sleeves, and a mermaid silhouette accented with a high-side slit on the long-length hem. The dress is composed of a lined velvet fabric that offers a moderate stretch. Complete the look in this long dress with rhinestone earrings and a sleek clutch.
Fit & Features
- Off-the-shoulder neckline
- Sweetheart bust
- Long fitted sheer lace sleeves
- Mermaid silhouette, form-hugging fit
- High side slit, long-length hem
- Velvet fabric, moderate stretch
- Strapless or sticky bra recommended
- Runs true to size
Style Number/Barcode: 05002-1306
Category Name: Long Formal Dresses
Price: $9.97 $54.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Jane Formal High Slit Satin Dress
Special Occasion
Create a head-turning moment with a formal dress that brings the luxe to your evening. Jane features a sleeveless square neckline, adjustable spaghetti straps, a high side slit for a show of leg accented with ruffle trim on the A-line silhouette. The dress is composed of a lined satin fabric that offers a form hugging fit with a moderate stretch. Complete look with rhinestone heels and a clutch.
Fit & Features
- Sleeveless, square neckline, adjustable spaghetti straps
- Adhesive bra recommended
- Ruffled high side slit
- A-Line silhouette
- Form-fitting design
- Smooth satin fabric, moderate stretch
- Fits true to size
Style Number/Barcode: 05002-1630
Category Name: Long Formal Dresses
Price: $9.97 $49.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale
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Esperanza Formal Sequin Cowl Dress
Special Occasion
Have the spotlight on you in the dazzling Esperanza sequin long dress, perfect for prom! She stuns in a classic sleeveless cowl neck with sleek bungee spaghetti straps that lead to the slight open-back with zipper closure. Her slenderizing A-line silhouette features a sultry front slit to showcase some skin on the floor-length hem. The formal dress is composed of sequin-knit lined fabric with minimal stretch. Complete the look in stiletto heels.
Fit & Features
- Sleeveless cowl neck, bungee spaghetti straps
- Adhesive bra recommended
- Slight open-back, zipper closure
- A-line silhouette
- Front slit, floor-length hem
- Sequin-knit lined fabric, minimal stretch
- Runs true to size
Style Number/Barcode: 05002-6868
Category Name: Long Formal Dresses
Price: $84.00 $119.90
On Sale: Yes
Availability: In Stock
Available Color: ROYAL
Available Size: XS, S, M
Product Badge:- Sale
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Eliza Sleeveless Formal Mermaid Dress
Special Occasion
Show off your gorgeous curves in the sleek and stunning Eliza formal dress. She features a sleeveless sweetheart neckline with a twist-front design, a padded bust with a chic keyhole cutout underneath, spaghetti straps, a high waist seam, and a floor-length mermaid silhouette. The smooth knit fabric offers plenty of stretch. Perfect for weddings, complete your best-dressed guest look with strappy heels.
Fit & Features
- Sleeveless sweetheart neckline, twist-front design
- Padded bust, no bra required, keyhole cutout underneath
- Spaghetti straps, back zipper, hook and eye closure
- High waist seam
- Floor-length, form-fitting, mermaid silhouette
- Smooth knit fabric, plenty of stretch
- Runs true to size
Style Number/Barcode: 05002-7010
Category Name: Long Formal Dresses
Price: $9.97 $54.90
On Sale: Yes
Availability: Out of Stock
Product Badge:- Sale