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.

SHOW FILTER

SORT:

MOST POPULAR
SIZE
COLOR
PRICE
ALL FILTERS
SORT
×
×
×
×



SEE RESULTS
Loading...
×
LONG FORMAL DRESSES
All Filters
Sort By:
MOST POPULAR
SEE RESULTS

Embrace 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!

  • Lyanna Formal Iridescent Sequin Mermaid Dress

    Special Occasion

    Dazzle with glitz and glamorous vibes in the stunning Lyanna formal sequin dress! She features a sleeveless V-neckline with a built-in padded bust, spaghetti straps, a bold open back with a cross-back, lace-up strappy design, a fitted bodice and hip-hugging fit, and a floor-length hem with a mermaid silhouette. The lined mesh fabric showcases iridescent sequin embroidery in an intricate geometric design. Style with a rhinestone necklace and earrings set for prom or any fancy gala!

    Fit & Features

    • Sleeveless V-neckline, padded bust, adjustable spaghetti straps
    • Open back, cross-back, lace-up strappy design, tie closure
    • Fitted bodice, hip-hugging fit, lower back zipper closure
    • Floor-length hem, mermaid silhouette
    • Iridescent sequin embroidery, geometric pattern
    • Sheer mesh fabric, full knit lining, minimal stretch
    • Sticky bra or pasties recommended
    • Runs true to size

    Style Number/Barcode: 05002-7890

    Category Name: Long Formal Dresses

    Price: $9.97 $119.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Denise Long Sleeve Glitter Knit Dress

    Special Occasion

    Create a head-turning formal look in the illuminating Denise glitter knit dress. She features a high crew neckline, long fitted sleeves, an asymmetrical back cutout, ruching down one side leading to a thigh-high slit, and a floor-length, fitted silhouette. Style this dress with sparkling rhinestone earrings and heels.

    Fit & Features

    • Crew neckline
    • Long fitted sleeves
    • Asymmetrical back cutout
    • Ruched detailing down one side, high side slit
    • Floor-length, fitted silhouette
    • Glitter knit fabric, moderate stretch
    • Runs true to size

    Style Number/Barcode: 05002-1706

    Category Name: Long Formal Dresses

    Price: $14.97 $64.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Bianca Ruched Mermaid Formal Dress

    Special Occasion

    Get a gorgeous, curve-hugging silhouette in the simple yet chic Bianca formal dress. She features a sleeveless deep V-neckline with a padded bust, spaghetti straps, front and back ruched detailing, and a floor-length, form-fitting mermaid silhouette. Style this dress with rhinestone earrings to add a pretty sparkle to the look.

    Fit & Features

    • Sleeveless V-neckline, built-in padded bust
    • Adjustable spaghetti straps
    • Front and back ruching
    • Floor-length mermaid silhouette
    • Form-hugging fit
    • Crepe fabric, moderate stretch
    • Runs true to size

    Style Number/Barcode: 05002-1922

    Category Name: Long Formal Dresses

    Price: $14.97 $44.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Tanya Formal Glitter A-Line Long Dress

    Special Occasion

    Gleaming with glitter, the Tanya formal dress transforms into a glistening display under the dance floor lights! A stunning option for prom, galas, and black tie events. She features a sleeveless V-neckline, adjustable spaghetti straps, a lightly padded bust, and hidden side pockets for keeping your hands warm. Her flattering A-line silhouette leads to her floor-sweeping hem showcasing a sultry high slit. The formal dress is composed of a glitter woven fabric with a stretchy knit lining. Complete the look with a dainty lariat necklace and earrings.

    Fit & Features

    • Sleeveless V-neckline, adjustable spaghetti straps
    • Lightly padded bust, back zipper closure
    • Hidden side pockets
    • A-line silhouette, high front slit, floor-length hem
    • Glitter woven fabric, stretchy knit lining
    • No bra required
    • Runs true to size

    Style Number/Barcode: 05002-7875

    Category Name: Long Formal Dresses

    Price: $9.97 $119.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Ria Formal High Slit Ruched Dress

    Special Occasion

    Captivate them all as you make a head-turning entrance in our Ria dress! She features an off-the-shoulder neckline with ruched off-shoulder strap accents, a slim-fit bodice that leads to a curve-hugging floor-length silhouette, and a ruched off-center high slit detail. The dress is composed of a double-lined smooth knit fabric that offers a moderate stretch. Complete your stunning look in sparkly heels.

    Fit & Features

    • Sleeveless off-the-shoulder neckline, strap accents
    • Strapless bra recommended
    • Slim-fit bodice, ruching, high-cut side slit
    • Curve-hugging floor-length silhouette
    • Double-lined knit fabric
    • Moderate stretch
    • Runs true to size

    Style Number/Barcode: 05002-0034

    Category Name: Long Formal Dresses

    Price: $14.97 $49.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Evangeline Crepe One Shoulder Dress

    Go for drama in our fab Evangeline. Her one-shoulder long sleeve and thigh-high slit add a modern and sophisticated touch. Slip right into her sleek and form-hugging silhouette that'll contour and celebrate your every curve. Complete look with a rhinestone clutch

    Fits & Features 

    • One-shoulder neckline, fitted long sleeve
    • Wired V-neckline
    • Back zipper closure 
    • Floor-length hemline, high side slit
    • Lined crepe fabric 
    • Form hugging fit, moderate stretch, runs true to size

    Style Number/Barcode: 05002-0892

    Category Name: Long Formal Dresses

    Price: $14.97 $59.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Amelia Formal Satin Embroidered Dress

    Special Occasion

    Intricate embroidery with beaded accents gives the Amelia formal satin dress a romantic allure at galas and banquets! She features a sleeveless sweetheart neckline with a pleated cowl draping, adjustable spaghetti straps, a padded bust with embroidery and faux pearls, a side pleated hip seam, and a flattering slim curve-hugging silhouette, front slit, and floor-length hem. The formal long dress is composed of silky satin fabric with a knit lining and moderate stretch. Complete the look in strappy block heels and a clutch.

    Fit & Features

    • Sleeveless sweetheart neckline, pleated cowl draping
    • Adjustable spaghetti straps, back zipper and hook-eye closure
    • Padded bust, embroidery, beaded accents
    • Side pleated hip seam
    • Slim, curve-hugging silhouette, front slit, floor-length hem
    • Silky satin fabric, knit lining, moderate stretch
    • Runs true to size

    Style Number/Barcode: 05002-7911

    Category Name: Long Formal Dresses

    Price: $79.90

    Availability: In Stock

    Available Color: NAVY, WINE

    Available Size: XS, S, M, L

  • Priscilla Formal Satin Strapless Mermaid Dress

    Special Occasion

    Make it an elegant entrance in the Priscilla formal satin mermaid long dress. She features a strapless sweetheart neckline, chic pleated detailing across the padded bust, a slim-fit bodice and a hip-hugging fit, and a floor-sweeping hem with a mermaid silhouette that will flaunt your gorgeous figure. The sleek lined satin-knit fabric showcases a luxe sheen. Complete the look with rhinestone statement earrings for your next gala or ball.

    Fit & Features

    • Strapless sweetheart neckline
    • Pleated, lightly padded bust, non-slip grip lining
    • Slim-fit bodice, high waist seam, hip-hugging fit
    • Floor-sweeping hem, mermaid silhouette
    • Lined silky satin fabric, minimal stretch
    • Strapless or sticky bra recommended
    • Runs true to size

    Style Number/Barcode: 05002-7464

    Category Name: Long Formal Dresses

    Price: $69.90

    Availability: In Stock

    Available Color: NAVY, BLACK

    Available Size: L, XS, S, M, XL

  • Clarice Formal Crepe Cutout Dress

    Special Occasion

     Elegant and sleek, Clarice brings the charm to your formal night! She stuns in a sleeveless, plunge v-neckline with sleek bungee spaghetti straps, princess seams along her fitted bodice with waist cutouts, and a revealing open back with lattice strap detail. Her form-fitting, a-line silhouette offers a show of leg in the sexy front high-cut slit along the floor-length hem. The special occasion dress is composed of a crepe-knit lined fabric with a moderate stretch. Complete your dressy look in an elegant choker and statement earrings.

    Fit & Features

    • Sleeveless, plunge v-neckline, bungee spaghetti straps
    • Built-in padded bust, fitted bodice, princess seams
    • Waist cutouts, open-back, lattice strap detail, zipper closure
    • Form-fitting, a-line silhouette, front high-cut slit
    • Floor-length hem
    • Crepe-knit lined fabric, moderate stretch
    • Fits true to size

    Style Number/Barcode: 05002-2413

    Category Name: Long Formal Dresses

    Price: $24.97 $59.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Alina Formal Illusion Lace A-Line Dress

    Special Occasion

    Create timeless elegance with a formal prom dress that impresses with stunning details. Alina features a sleeveless sweetheart neckline, sheer lace shoulder straps, and a partially sheer illusion lace bodice. The bodice features a corset-like design, padded and lined cups with underwire, and contrast piping seams. The slim-fit bodice leads to a flowy A-Line silhouette that is perfect for making a grand entrance. Alina is composed of a sheer lined mesh fabric with floral embroidery throughout and includes a floor-length knit lining with a high side slit. The dress offers minimal stretch. Complete your outfit with rhinestone heels and a sleek clutch.

    Fit & Features

    • Sleeveless, sweetheart neck, sheer straps
    • Built-in padded bust, underwire
    • Illusion lace corset-style bodice
    • Back zipper and hook-eye closure
    • Floor-length A-line silhouette
    • Floral embroidered, mesh fabric, full knit lining, minimal stretch
    • Minimal stretch
    • Runs true to size

    Style Number/Barcode: 05002-1584

    Category Name: Long Formal Dresses

    Price: $19.97 $109.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Clearance
  • Kelsey Halter Lace-Up Mermaid Dress

    Special Occasion

    Step out and slay in the sultry and chic Kelsey dress! She features a sleeveless bodice, a plunging V-neckline, and halter straps that lead to a lace-up back design that lets you adjust the fit on the form-hugging mermaid hem. Style this dress with rhinestone statement earrings and a sparkly clutch.

    Fit & Features

    • Sleeveless bodice, deep V-neckline
    • Halter straps
    • Lace-up back design
    • Floor-length mermaid silhouette
    • Form-hugging fit
    • Stretchy knit fabric, short lining
    • Runs true to size

    Style Number/Barcode: 05002-1305

    Category Name: Long Formal Dresses

    Price: $19.97 $46.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Gabby Formal Mesh Strapless Ruffle Long Dress

    Special Occasion

    The Gabby formal long dress gives an aurora of dreamy romance perfect for bridesmaids, weddings, or banquets, She features a strapless neckline with non-slip grip lining, asymmetrical ruffle trim throughout her flattering slim silhouette, and a sexy high side slit along the floor-length hem. The formal maxi dress is composed of an airy mesh fabric for an elevated style and has a sewn-in knit lining. Complete the look with dainty earrings.

    Fit & Features

    • Strapless neckline, non-slip grip lining
    • Side zipper and hook-eye closure
    • Asymmetrical ruffle trim throughout
    • Slim silhouette, floor-length hem
    • Mesh fabric, sewn-in knit lining
    • Strapless bra recommended
    • Runs true to size

    Style Number/Barcode: 05002-7801

    Category Name: Long Formal Dresses

    Price: $64.90

    Availability: In Stock

    Available Color: PINK

    Available Size: M

  • Keanna Formal Sequin Mermaid Long Dress

    Special Occasion

    A gorgeous pattern of sequins adorns the Keanna formal dress to make your perfect entrance at galas or as a bridesmaid! She stuns in a sleeveless square neck with sleek bungee spaghetti straps, a form-hugging mermaid silhouette that effortlessly flows into the floor-length hem. The formal dress is composed of a sequin-scroll pattern mesh fabric with a stretchy knit lining. Complete the look with a rhinestone choker.

    Fit & Features

    • Sleeveless square neck
    • Bungee spaghetti straps
    • Back zipper closure
    • Form-hugging, mermaid silhouette
    • Floor-length hem
    • Sequin-scroll pattern, mesh fabric, stretchy knit lining
    • Runs true to size

    Style Number/Barcode: 05002-6982

    Category Name: Long Formal Dresses

    Price: $24.97 $139.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Mila High Slit Ruched Dress

    Special Occasion 

    Show off a hint of leg in our sultry Mila dress! She features a sleeveless trendy square neckline, adjustable spaghetti straps, ruched side seams, and a floor-length, curve-hugging silhouette with a thigh-high side slit. Style this dress with a pair of sleek stilettos and lots of shine for an A-list look!

    Fit & Features

    • Sleeveless square neckline
    • Adjustable spaghetti straps
    • Ruched side seams
    • Floor-length, form-fitting silhouette
    • High side slit
    • Lined smooth knit fabric, moderate stretch
    • Runs true to size

    Style Number/Barcode: 05002-0880

    Category Name: Long Formal Dresses

    Price: $19.97 $46.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Isla Satin One-Shoulder Wrap Dress

    Special Occasion

    The Isla satin formal dress will have you wrapped in luxe glamour and draw everyone's attention! She features a sleeveless asymmetric one-shoulder neckline with a wide strap, a pleated wrap design at the bust, a slim-fit bodice with pleating at the waist and flexible boning, and a curve-hugging, floor-length silhouette with a wrap-front design creating a chic front slit. The sleek satin-knit fabric has a gorgeous sheen and minimal stretch. Complete your fancy look in this long wrap dress with rhinestone heels.

    Fit & Features

    • Sleeveless asymmetric one-shoulder neckline, wide strap
    • Pleated wrap design at the bust, flexible boning, back zipper closure
    • High waist seam, slim-fit bodice, pleating at the waist
    • Curve-hugging, floor-length silhouette, wrap-front design, front slit
    • Lined satin-knit fabric, minimal stretch
    • Strapless or sticky bra recommended
    • Runs true to size

    Style Number/Barcode: 05002-6977

    Category Name: Long Formal Dresses

    Price: $64.90

    Availability: In Stock

    Available Color: GOLD

    Available Size: XS, S, M

  • Plus Roxy Sweetheart Dress

    Special Occasion

    Keep it classy for your next formal event! Our Roxy floor length dress features an off the shoulder sweetheart neckline that creates short sleeves, light pleating along the bodice to create a flattering hourglass silhouette and a large front slit to provide a tease of leg leading to a trumpet skirt. She is composed of a crepe fabric that offers a luxurious feel and offers plenty of stretch.  

    *Web exclusive - online returns only* 

    Model is 5'11 with a 47" bust, 40.5" waist and 57.5" hips. She is wearing a size 1X.

    Special Occasion products cannot be returned to any retail locations.

    Style Number/Barcode: 15002-0001

    Category Name: Long Formal Dresses

    Price: $29.97 $59.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Quincy A-Line High Slit Formal Dress

    Special Occasion

    Slip into the simple yet chic Quincy formal dress! She features a sleeveless cowl neckline, adjustable spaghetti straps for a customizable fit, an open back with a lace-up tie design, and a fitted, floor-length, A-line silhouette with a high side slit. Style this dress with rhinestone heels to add a hint of sparkle.

    Fit & Features

    • Sleeveless cowl neckline, adjustable spaghetti straps
    • Built-in padded bust, no bra required
    • Open back, lace-up design, tie closure
    • Back zipper closure
    • Floor-length, A-line silhouette, side slit
    • Smooth knit-lined fabric, moderate stretch
    • Runs true to size

    Style Number/Barcode: 05002-7880

    Category Name: Long Formal Dresses

    Price: $24.97 $99.90

    On Sale: Yes

    Availability: Out of Stock

  • Petra Formal Iridescent Sequin Dress

    Special Occasion

    Make a dazzling entrance in a formal dress that enchants from the moment you enter the room of your special event! Petra features a plunging sleeveless V-neckline with a padded bust, corded spaghetti straps that lead to a lace-up back design, and iridescent sequins throughout. She is composed of a lined mesh fabric that offers a form-hugging fit with minimal stretch. Complete the look with a sphere clutch.

    Fit & Features

    • Sleeveless V-neckline, corded spaghetti straps
    • Padded bust, no bra required
    • Lace-up back design, lower back zipper closure
    • Iridescent sequins
    • Lined mesh fabric
    • Form-hugging fit, minimal stretch
    • Runs true to size

    Style Number/Barcode: 05002-6870

    Category Name: Long Formal Dresses

    Price: $9.97 $159.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Deirdre Sequin Mesh Slit Gown

    Special Occasion

    Shine all evening long in our dazzling bodycon Deirdre gown! She features all-over patterned sequin embellishment, adjustable cross-back spaghetti straps, a V-neck bodice with beige mesh panel at bust and back zip with hook-and-eye closure, and a high-seam waist leading to a long skirt with high side slit. Deirdre is fully lined and made from a woven mesh blend with minimal stretch.

    Model is 5'7" with a 34" bust, 24" waist and 36" hips. She is wearing a size small.

    Special Occasion products cannot be returned to any retail locations.

    Style Number/Barcode: 05002-0283

    Category Name: Long Formal Dresses

    Price: $14.97 $99.90

    On Sale: Yes

    Availability: Out of Stock

  • Francine Formal Open Back Glitter Dress

    Special Occasion 

    Make an illuminating entrance with a formal dress that glows under the spotlight. Francine features a crew neckline, long fitted sleeves, a daring open back, tie-back ties, ruching at the lower back, and a mermaid silhouette. The dress is composed of a glitter knit fabric that offers a form-hugging fit with moderate stretch. Complete the look with rhinestone heels and a clutch.

    Fit & Features

    • Crew neckline, single-button closure at the back of the neck
    • Long fitted sleeves
    • Open back, tie-back ties
    • Ruching at the lower back 
    • Mermaid silhouette, form-hugging fit
    • Glitter knit fabric, lining at the bust, moderate stretch
    • Sticky bra recommended
    • Runs true to size

    Style Number/Barcode: 05002-1713

    Category Name: Long Formal Dresses

    Price: $9.97 $72.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Georgina Formal Velvet Long Dress

    Special Occasion

    Soft to the touch and oh-so-luxe, you'll be a favorite among party-goers in the ravishing Georgina formal dress perfect for weddings, black tie events, and red carpets. She features an off-the-shoulder sweetheart neckline, short-sleeve cuffs, a lightly padded bust, a pleated side seam, and a form-hugging mermaid silhouette with a flirty slit along her floor-length hem. The long formal dress is composed of luxurious velvet fabric. Style with statement earrings to complete the look!

    Fit & Features

    • Off-the-shoulder sweetheart neckline, short-sleeve cuffs
    • Lightly padded bust, pleated side seam
    • Form-hugging, mermaid silhouette
    • Front slit, floor-length hem
    • Lined velvet fabric, moderate stretch
    • Strapless or sticky bra recommended
    • Runs true to size

    Style Number/Barcode: 05002-2612

    Category Name: Long Formal Dresses

    Price: $19.97 $64.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Charmaine Formal One-Shoulder Satin Dress

    Special Occasion

    Make an elegant impression with a formal dress that makes a breathtaking entrance! Charmaine features a one-shoulder neckline with a draped short sleeve, a high side slit, and an A-line silhouette. The dress is composed of a satin-like fabric that offers a form-hugging fit. Complete the look with rhinestone heels.

    Fit & Features

    • One-shoulder neckline, draped short sleeve
    • Built-in padded bust, no bra required
    • Back zipper closure, high side slit
    • Form-fitting, a-line silhouette
    • Satin-lined fabric, moderate stretch
    • Runs true to size

    Style Number/Barcode: 05002-1325

    Category Name: Long Formal Dresses

    Price: $9.97 $64.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Clearance
  • Jenny A-Line Satin Formal Dress

    Special Occasion

    Bring the drama in the eye-catching and chic Jenny satin formal dress. She features a sleeveless square neckline with ruched detailing, adjustable spaghetti straps, and a sultry lace-up back design. Her flattering high waist seam flows out to a floor-length A-line silhouette with side pockets and a thigh-high front slit. Style this dress with rhinestone statement earrings and a sleek clutch.

    Fit & Features

    • Sleeveless square neckline, ruched detailing
    • Adjustable spaghetti straps
    • Lace-up back design, lower back zipper and hook and eye closure
    • High waist seam, floor-length A-line silhouette
    • Side pockets, high front slit
    • Woven satin fabric, woven lining, no stretch
    • Runs true to size

    Style Number/Barcode: 05002-1685

    Category Name: Long Formal Dresses

    Price: $19.97 $89.90

    On Sale: Yes

    Availability: Out of Stock

    Product Badge:
    • Sale
  • Jessica Formal Lace Slit Long Dress

    Special Occasion

    Delightfully alluring and effortless! Unveil your beauty in the Jessica formal lace dress for your walk down the aisle as a bride or graduate! She brings the romance in her sleeveless V-neckline with scallop trim, adjustable spaghetti straps, a lightly padded bust, and a slim curve-hugging silhouette with a sultry high side slit and long hem. The formal dress is composed of a lace fabric with a stretchy knit lining. Style with earrings and simple block heels.

    Fit & Features

    • Sleeveless V-neckline, scallop trim
    • Adjustable spaghetti straps, lightly padded bust
    • Slim, curve-hugging silhouette
    • High side slit, long hem
    • Lace fabric, stretchy knit lining
    • Bra optional
    • Runs true to size

    Style Number/Barcode: 05002-5577

    Category Name: Long Formal Dresses

    Price: $29.97 $44.90

    On Sale: Yes

    Availability: Out of Stock