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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
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
  • Detail: Plain
  • Fabric: Polyester
$109.00 $219.00
black color cobalt color
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
  • Neckline: Plunge
$109.00 $309.00
favourite
Pleated Beaded Detail Balloon Sleeve Maxi Dress
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KarenMillen

Pleated Beaded Detail Balloon Sleeve Maxi Dress

  • Design: Plain
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
$319.00
blue color red 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
$179.00 $359.00
favourite
Premium Embellished Cape Maxi Dress
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KarenMillen

Premium Embellished Cape Maxi Dress

  • Design: Fabric Interest
  • Detail: Embellished
  • Fabric: Woven
$849.00
nude color navy 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
$179.00 $359.00
green color black color
favourite
Long Sleeve Slinky Drape Ruched Detail Maxi Dress
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KarenMillen

Long Sleeve Slinky Drape Ruched Detail Maxi Dress

  • Detail: Plain
  • Length: Maxi
  • Style: Maxi Dress
$229.00
favourite
Embroidered Organdie Balloon Sleeve Woven Maxi Dress
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KarenMillen

Embroidered Organdie Balloon Sleeve Woven Maxi Dress

  • Detail: Embellished
  • Length: Maxi
  • Neckline: Crew
$219.00 $609.00
favourite
Pleated Tiered Maxi Dress
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KarenMillen

Pleated Tiered Maxi Dress

  • Detail: Plain
  • Fabric: Woven
  • Length: Maxi
$219.00 $359.00
purple color blue color
favourite
Kimono Sleeve Embellished Maxi Dress
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KarenMillen

Kimono Sleeve Embellished Maxi Dress

  • Neckline: Crew
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
$189.00 $539.00
favourite
Pleated Slub Organdie Peplum Woven Maxi Dress
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KarenMillen

Pleated Slub Organdie Peplum Woven Maxi Dress

  • Design: Plain
  • Detail: Pleated
  • Sleeve length: Strappy
$359.00
favourite
Cutwork Beaded Embroidered Woven Maxi Dress
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KarenMillen

Cutwork Beaded Embroidered Woven Maxi Dress

  • Detail: Embroidered
  • Fabric: Woven
  • Sleeve length: Long Sleeve
$229.00 $669.00
favourite
Plus Size Blurred Floral Cross Detail Tulle Maxi Dress
Plus
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KarenMillen

Plus Size Blurred Floral Cross Detail Tulle Maxi Dress

  • Design: Floral
  • Detail: Ruffle
  • Neckline: Round Neck
$309.00
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
  • Length: Maxi
$119.00 $339.00
favourite
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

  • Fabric: Polyester
  • Neckline: V Neck
  • Sleeve length: Long Sleeve
$129.00 $359.00
emerald color cobalt color
favourite
Taffeta Bow Detail Woven Maxi Dress
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KarenMillen

Taffeta Bow Detail Woven Maxi Dress

  • Detail: Bow
  • Neckline: One Shoulder
  • Sleeve length: Sleeveless
$169.00 $679.00
black color hot-pink color
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
Voile Embroidered Cutwork Balloon Sleeve Woven Maxi Dress
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KarenMillen

Voile Embroidered Cutwork Balloon Sleeve Woven Maxi Dress

  • Design: Embroidered
  • Detail: Embroidered
  • Neckline: Round Neck
$189.00 $539.00
favourite
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
$149.00 $309.00
favourite
Petite Square Neck Tailored Full Skirted Maxi Dress
Petite
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KarenMillen

Petite Square Neck Tailored Full Skirted Maxi Dress

  • Fabric: Polyester
  • Length: Maxi
  • Neckline: Square
$179.00 $359.00
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
$189.00 $769.00
ivory color blue color
favourite
Petite Spot Print Pleated Slub Organdie Peplum Woven Maxi Dress
Petite
View
KarenMillen

Petite Spot Print Pleated Slub Organdie Peplum Woven Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Neckline: Strappy
$179.00 $359.00
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
$79.00 $229.00
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
Plus Size Square Neck Tailored Full Skirted Maxi Dress
Plus
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KarenMillen

Plus Size Square Neck Tailored Full Skirted Maxi Dress

  • Detail: Plain
  • Length: Maxi
  • Neckline: Square
$359.00
favourite
Feather Crystal Embellished Maxi Dress
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KarenMillen

Feather Crystal Embellished Maxi Dress

  • Design: Embroidered
  • Length: Maxi
  • Neckline: Crew
$269.00 $759.00
favourite
Plus Size Photographic Floral Crinkle Georgette High Neck Cold Shoulder Woven Maxi Dress
Plus
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KarenMillen

Plus Size Photographic Floral Crinkle Georgette High Neck Cold Shoulder Woven Maxi Dress

  • Length: Maxi
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
$289.00
burgundy color green color
favourite
Petite Pleated Slub Organdie Ombre Woven Maxi Dress
Petite
View
KarenMillen

Petite Pleated Slub Organdie Ombre Woven Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Style: Maxi Dress
$179.00 $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

  • Length: Maxi
  • Sleeve length: Strappy
  • Style: Maxi Dress
$119.00 $289.00
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
Organza Collared Maxi Dress
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KarenMillen

Organza Collared Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Neckline: Collared
$289.00
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
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
$159.00 $469.00
favourite
Plus Size Puff Sleeve Metallic Textured Midi Dress
Tall
Plus
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KarenMillen

Plus Size Puff Sleeve Metallic Textured Midi Dress

  • Fabric: Woven
  • Length: Midi
  • Style: Midi Dress
$229.00
favourite
Embellished Ruffle Strappy Woven Maxi Dress
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KarenMillen

Embellished Ruffle Strappy Woven Maxi Dress

  • Detail: Embellished
  • Neckline: Strappy
  • Sleeve length: Strappy
$159.00 $629.00
favourite
Petite Organza Collared Maxi Dress
Petite
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KarenMillen

Petite Organza Collared Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Sleeve length: Sleeveless
$289.00
favourite
Plus Size Jacquard Asymmetric Sleeve Midi Dresss
Plus
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KarenMillen

Plus Size Jacquard Asymmetric Sleeve Midi Dresss

  • Design: Jacquard
  • Detail: Jacquard
  • Style: Midi Dress
$309.00
favourite
Plus Size Textured Satin Ruffle Detail Midi Dress
Plus
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KarenMillen

Plus Size Textured Satin Ruffle Detail Midi Dress

  • Design: Plain
  • Sleeve length: Short Sleeve
  • Style: Midi Dress
$129.00 $269.00
favourite
Soft Tailored Side Pleated Midi Dress
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KarenMillen

Soft Tailored Side Pleated Midi Dress

  • Length: Midi
  • Sleeve length: Sleeveless
  • Style: Midi Dress
$149.00 $409.00
favourite
Petite Soft Pleated Woven Kimono Sleeve Maxi Dress
Petite
View
KarenMillen

Petite Soft Pleated Woven Kimono Sleeve Maxi Dress

  • Detail: Pleated
  • Fabric: Woven
  • Style: Maxi Dress
$99.00 $289.00
Showing 40 of 114
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