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Plus Size Birthday Dresses

Custom cuts for celebration-ready elegance, find an unforgettable birthday fit for 21st, 30th and beyond in the plus size birthday dresses edit. Offering a bespoke approach to after-dark luxury, the mini, midi and maxi silhouettes in the plus size birthday dresses collection boast premium textiles aplenty. Think tactile silhouettes that flow with plenty of silk, chiffon, mesh, leather, satin, and polished twill iterations, alongside sculpting iterations that are crafted from close-fitting knits. You’ll find plenty of ponte, structured crêpe, knitted jersey, and our industry-revered Compact Stretch — creating a contoured approach to plus size birthday outfits. Find your signature color from streamlined black, feminine pink, refined neutrals, soft pastels, and plenty of bold brights. Party-ready with dramatic touches (such as feather cuffs, shimmering sequins, bright paillettes, lace trims and intricate embellishments), find birthday dresses for women plus size below.
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favourite
Pleated Slub Organdie Peplum Woven Maxi Dress
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KarenMillen

Pleated Slub Organdie Peplum Woven Maxi Dress

  • Design: Plain
  • Fabric: Woven
  • Sleeve length: Strappy
$359.00
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Pleated Tiered Maxi Dress
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KarenMillen

Pleated Tiered Maxi Dress

  • Detail: Plain
  • Neckline: Bandeau
  • Style: Maxi Dress
$359.00
blue color purple color
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Pleated Slub Organdie Ombre Woven Maxi Dress
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KarenMillen

Pleated Slub Organdie Ombre Woven Maxi Dress

  • Design: Plain
  • Length: Maxi
  • Neckline: Strappy
$359.00
favourite
Stretch Drapey Crepe Ruched Plunge Neck Batwing Sleeve Maxi Dress
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KarenMillen

Stretch Drapey Crepe Ruched Plunge Neck Batwing Sleeve Maxi Dress

  • Design: Plain
  • Neckline: Plunge
  • Style: Maxi Dress
$219.00
black color cobalt color
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Embroidered Organdie Balloon Sleeve Woven Maxi Dress
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KarenMillen

Embroidered Organdie Balloon Sleeve Woven Maxi Dress

  • Design: Embroidered
  • Neckline: Crew
  • Sleeve length: Long Sleeve
$209.00 $609.00
favourite
Polka Dot Tulle Plunge Balloon Sleeve Maxi Dress
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KarenMillen

Polka Dot Tulle Plunge Balloon Sleeve Maxi Dress

  • Design: Polka dot
  • Length: Maxi
  • Sleeve length: Long Sleeve
$109.00 $309.00
favourite
Petite Sequin Power Mesh Lace Up Front Halter Neck Split Detail Maxi Dress
Petite
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KarenMillen

Petite Sequin Power Mesh Lace Up Front Halter Neck Split Detail Maxi Dress

  • Detail: Sequin
  • Length: Maxi
  • Sleeve length: Sleeveless
$89.00 $269.00
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Kimono Sleeve Embellished Maxi Dress
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KarenMillen

Kimono Sleeve Embellished Maxi Dress

  • Detail: Embellished
  • Length: Maxi
  • Sleeve length: Long Sleeve
$159.00 $539.00
blue color rust color
favourite
Spot Print Pleated Slub Organdie Peplum Woven Maxi Dress
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KarenMillen

Spot Print Pleated Slub Organdie Peplum Woven Maxi Dress

  • Detail: Plain
  • Neckline: Strappy
  • Style: Maxi Dress
$359.00
black color green color
favourite
Hotfix Studded Long Sleeve Shirt Woven Maxi Dress
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KarenMillen

Hotfix Studded Long Sleeve Shirt Woven Maxi Dress

  • Detail: Studded
  • Fabric: Woven
  • Style: Maxi Dress
$119.00 $339.00
ivory color black color
favourite
Plus Size Spot Woven Twill Prom Skirt
Plus
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KarenMillen

Plus Size Spot Woven Twill Prom Skirt

  • Fabric: Woven
  • Length: Midi
  • Style: Skirt
$199.00
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Petite Crinkle Cross Front Georgette Woven Maxi Dress
Petite
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KarenMillen

Petite Crinkle Cross Front Georgette Woven Maxi Dress

  • Fabric: Woven
  • Length: Maxi
  • Style: Maxi Dress
$309.00
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Premium Stretch Crepe Jersey V Neck Zip Detail Maxi Dress
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KarenMillen

Premium Stretch Crepe Jersey V Neck Zip Detail Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Fabric: Polyester
$129.00 $359.00
emerald color cobalt color
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Feather Embellished Woven Cape Sleeve Maxi Dress
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KarenMillen

Feather Embellished Woven Cape Sleeve Maxi Dress

  • Design: Plain
  • Detail: Printed
  • Neckline: V Neck
$219.00 $879.00
taupe color raspberry color
favourite
Petite Spot Print Pleated Slub Organdie Peplum Woven Maxi Dress
Petite
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KarenMillen

Petite Spot Print Pleated Slub Organdie Peplum Woven Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Neckline: Strappy
$359.00
favourite
Petite Square Neck Tailored Full Skirted Maxi Dress
Petite
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KarenMillen

Petite Square Neck Tailored Full Skirted Maxi Dress

  • Design: Spots
  • Sleeve length: Short Sleeve
  • Style: Maxi Dress
$359.00
orange color red color
favourite
Petite Pleated Slub Organdie Peplum Woven Maxi Dress
Petite
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KarenMillen

Petite Pleated Slub Organdie Peplum Woven Maxi Dress

  • Fabric: Woven
  • Length: Maxi
  • Sleeve length: Strappy
$359.00
favourite
Taffeta Bow Detail Woven Maxi Dress
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KarenMillen

Taffeta Bow Detail Woven Maxi Dress

  • Design: Plain
  • Fabric: Polyester
  • Length: Maxi
$169.00 $679.00
black color hot-pink color
favourite
Plus Size Foil Metallic Figure Form Angel Sleeve Knit Maxi Dress
Tall
Plus
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KarenMillen

Plus Size Foil Metallic Figure Form Angel Sleeve Knit Maxi Dress

  • Fabric: Polyester
  • Length: Maxi
  • Neckline: V Neck
$269.00
favourite
Voile Embroidered Cutwork Balloon Sleeve Woven Maxi Dress
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KarenMillen

Voile Embroidered Cutwork Balloon Sleeve Woven Maxi Dress

  • Design: Embroidered
  • Fabric: Woven
  • Neckline: Round Neck
$189.00 $539.00
favourite
Petite Pleated Slub Organdie Ombre Woven Maxi Dress
Petite
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KarenMillen

Petite Pleated Slub Organdie Ombre Woven Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Style: Maxi Dress
$359.00
favourite
Whitley Neill Plus Size Premium Crystal Embellished Midi Dress
Plus
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KarenMillen

Whitley Neill Plus Size Premium Crystal Embellished Midi Dress

  • Detail: Embellished
  • Length: Midi
  • Style: Midi Dress
$409.00
favourite
Archive Collection - Corset Detail Georgette Cape Woven Maxi Dress
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KarenMillen

Archive Collection - Corset Detail Georgette Cape Woven Maxi Dress

  • Detail: Corset
  • Fabric: Polyester
  • Length: Maxi
$229.00 $769.00
blue color ivory color
favourite
Cutwork Beaded Embroidered Woven Maxi Dress
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KarenMillen

Cutwork Beaded Embroidered Woven Maxi Dress

  • Fabric: Woven
  • Neckline: Round Neck
  • Sleeve length: Long Sleeve
$229.00 $669.00
favourite
Petite Compact Stretch Viscose Maxi Dress
Petite
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KarenMillen

Petite Compact Stretch Viscose Maxi Dress

  • Detail: Plain
  • Sleeve length: Sleeveless
  • Style: Maxi Dress
$139.00 $469.00
favourite
Feather Crystal Embellished Maxi Dress
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KarenMillen

Feather Crystal Embellished Maxi Dress

  • Design: Embroidered
  • Length: Maxi
  • Neckline: Crew
$259.00 $759.00
favourite
Plus Size Square Neck Tailored Full Skirted Maxi Dress
Plus
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KarenMillen

Plus Size Square Neck Tailored Full Skirted Maxi Dress

  • Design: Spots
  • Detail: Plain
  • Neckline: Square
$359.00
favourite
Petite Compact Stretch Tailored Colour Block Full Skirted Midi Dress
Petite
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KarenMillen

Petite Compact Stretch Tailored Colour Block Full Skirted Midi Dress

  • Fabric: Polyester
  • Length: Midi
  • Neckline: Crew
$149.00 $429.00
ivory color dusty-rose color
favourite
Velvet Long Sleeve Wrap V Neck Maxi Dress
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KarenMillen

Velvet Long Sleeve Wrap V Neck Maxi Dress

  • Fabric: Velvet
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
$69.00 $229.00
favourite
Petite Drapey Crepe Ruched Detail Maxi Dress
Petite
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KarenMillen

Petite Drapey Crepe Ruched Detail Maxi Dress

  • Fabric: Acetate slinky
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
$269.00
favourite
Soft Pleated Woven Kimono Sleeve Maxi Dress
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KarenMillen

Soft Pleated Woven Kimono Sleeve Maxi Dress

  • Design: Plain
  • Detail: Pleated
  • Neckline: Crew
$89.00 $249.00
favourite
Plus Size Foil Metallic Figure Form Bandage Strappy Knit Maxi Dress
Tall
Plus
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KarenMillen

Plus Size Foil Metallic Figure Form Bandage Strappy Knit Maxi Dress

  • Length: Maxi
  • Sleeve length: Strappy
  • Style: Maxi Dress
$99.00 $289.00
blush color pale-blue color
favourite
Petite Devoure One Shoulder Woven Maxi Dress With Trim Detail
Petite
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KarenMillen

Petite Devoure One Shoulder Woven Maxi Dress With Trim Detail

  • Design: All Over Print
  • Neckline: One Shoulder
  • Style: Maxi Dress
$119.00 $339.00
favourite
Embellished Ruffle Strappy Woven Maxi Dress
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KarenMillen

Embellished Ruffle Strappy Woven Maxi Dress

  • Fabric: Polyester
  • Length: Maxi
  • Sleeve length: Strappy
$189.00 $629.00
favourite
Plus Size Tailored Belted Midi Shirt Dress
Plus
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KarenMillen

Plus Size Tailored Belted Midi Shirt Dress

  • Detail: Buttons
  • Length: Midi
  • Neckline: Collared
$129.00 $359.00
favourite
Plus Size Foil Metallic Figure Form Bandage Strappy Knit Maxi Dress
Tall
Plus
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KarenMillen

Plus Size Foil Metallic Figure Form Bandage Strappy Knit Maxi Dress

  • Design: Plain
  • Neckline: Square
  • Sleeve length: Strappy
$99.00 $289.00
favourite
Petite Crystal Embellished Cady Woven Cape Maxi Dress
Petite
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KarenMillen

Petite Crystal Embellished Cady Woven Cape Maxi Dress

  • Fabric: Polyester
  • Neckline: Crew
  • Style: Maxi Dress
$329.00 $1079.00
favourite
Plus Size Foil Metallic Figure Form Bandage Angel Sleeve Knit Maxi Dress
Tall
Plus
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KarenMillen

Plus Size Foil Metallic Figure Form Bandage Angel Sleeve Knit Maxi Dress

  • Length: Maxi
  • Sleeve length: Sleeveless
  • Style: Maxi Dress
$289.00
favourite
Plus Size Sequin Halter Neck Hanky Hem Maxi Dress
Plus
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KarenMillen

Plus Size Sequin Halter Neck Hanky Hem Maxi Dress

  • Design: Plain
  • Neckline: Halterneck
  • Style: Maxi Dress
$309.00
favourite
Petite Viscose Blend Sheer Skirt Maxi Knit Dress
Petite
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KarenMillen

Petite Viscose Blend Sheer Skirt Maxi Knit Dress

  • Fabric: Knitted
  • Length: Maxi
  • Neckline: V Neck
$89.00 $249.00
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