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Plus Size Birthday Dresses

Spotlighting our esteemed focus on bespoke size and fit, discover an elevated edit of plus size birthday dresses that will mark your moment with luxurious aplomb. Ready for your 21st, 30th, 40th, and beyond, the mini, midi, and maxi silhouettes in our plus size birthday dress edit are crafted from premium textiles. 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 bespoke fit with four-way support. Scintillating with extra-special aplomb, you’ll also find the plus size sequin birthday dress below. Find your plus size dress for birthday below.
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favourite
Scuba Drama Ruffle Hem Woven Maxi Dress
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KarenMillen

Scuba Drama Ruffle Hem Woven Maxi Dress

  • Detail: Ruffle
  • Neckline: Crew
  • Style: Maxi Dress
£159.00
favourite
Figure Form Crystal Embellished Maxi Dress
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KarenMillen

Figure Form Crystal Embellished Maxi Dress

  • Detail: Embellished
  • Length: Maxi
  • Neckline: V Neck
£83.40 £139.00
favourite
Crystal Neck Trim Viscose Ribbed Maxi Dress With Godets
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KarenMillen

Crystal Neck Trim Viscose Ribbed Maxi Dress With Godets

  • Detail: Embellished
  • Fabric: Knitted
  • Length: Maxi
£83.40 £139.00
favourite
Drapey Crepe Maxi Dress With Gathered Cape Detail
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KarenMillen

Drapey Crepe Maxi Dress With Gathered Cape Detail

  • Design: Plain
  • Detail: Ruched
  • Fabric: Polyester
£74.00 £149.00
favourite
Stretch Crepe Jersey Plunge Neck Maxi Dress
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KarenMillen

Stretch Crepe Jersey Plunge Neck Maxi Dress

  • Detail: Draping
  • Length: Maxi
  • Neckline: V Neck
£107.40 £179.00
favourite
Stretch Velvet Crystal Embellished Long Sleeve Maxi Dress
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KarenMillen

Stretch Velvet Crystal Embellished Long Sleeve Maxi Dress

  • Design: Fabric Interest
  • Fabric: Jersey
  • Sleeve length: Long Sleeve
£89.40 £149.00
black color burgundy color
favourite
Crystal Embellished Ruched Detail Sleeveless Midi Dress
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KarenMillen

Crystal Embellished Ruched Detail Sleeveless Midi Dress

  • Length: Midi
  • Sleeve length: Long Sleeve
  • Style: Midi Dress
£63.00 £179.00
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
£77.40 £129.00
favourite
Twist Detail Studded Jersey Maxi Dress
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KarenMillen

Twist Detail Studded Jersey Maxi Dress

  • Detail: Studded
  • Fabric: Jersey
  • Style: Maxi Dress
£90.00 £179.00
olive color light-blue color
favourite
Ponte And Georgette Mix Balloon Sleeve Cut Out Detail Pleated Maxi Dress
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KarenMillen

Ponte And Georgette Mix Balloon Sleeve Cut Out Detail Pleated Maxi Dress

  • Fabric: Jersey
  • Length: Maxi
  • Sleeve length: Long Sleeve
£65.00 £129.00
khaki color black color
favourite
Crystal Embellished Ruched Detail Sleeveless Midi Dress
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KarenMillen

Crystal Embellished Ruched Detail Sleeveless Midi Dress

  • Detail: Embellished
  • Fabric: Polyester
  • Sleeve length: Long Sleeve
£63.00 £179.00
favourite
Plus Size Forever Twill Woven Prom Maxi Skirt
Plus
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KarenMillen

Plus Size Forever Twill Woven Prom Maxi Skirt

  • Design: Plain
  • Length: Maxi
  • Style: Maxi Skirt
£99.00
favourite
Plus Size Pinstripe Tailored Sleeveless Midi Dress
Plus
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KarenMillen

Plus Size Pinstripe Tailored Sleeveless Midi Dress

  • Design: Pinstripe
  • Length: Midi
  • Sleeve length: Sleeveless
£199.00
favourite
Plus Size Pinstripe Belted Tailored Shirt Dress
Plus
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KarenMillen

Plus Size Pinstripe Belted Tailored Shirt Dress

  • Neckline: Collared
  • Sleeve length: Sleeveless
  • Style: Shirt Dress
£249.00
favourite
Plus Size Gold Beaded Bandeau Velvet Midi Dress
Plus
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KarenMillen

Plus Size Gold Beaded Bandeau Velvet Midi Dress

  • Design: Embellished
  • Length: Midi
  • Neckline: Bandeau
£259.00
favourite
Plus Size Pleated Bead Detail Halterneck Maxi Dress
Plus
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KarenMillen

Plus Size Pleated Bead Detail Halterneck Maxi Dress

  • Design: Plain
  • Length: Maxi
  • Style: Maxi Dress
£89.40 £149.00
black color navy color
favourite
Crystal Applique Angel Sleeve Woven Maxi Dress
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KarenMillen

Crystal Applique Angel Sleeve Woven Maxi Dress

  • Detail: Applique
  • Sleeve length: Short Sleeve
  • Style: Maxi Dress
£293.40 £489.00
sage color hot-pink color mint color
favourite
Drapey Crepe Off The Shoulder Ruched Detail Fishtail Maxi Dress
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KarenMillen

Drapey Crepe Off The Shoulder Ruched Detail Fishtail Maxi Dress

  • Design: Plain
  • Detail: Ruched
  • Neckline: Off the Shoulder
£149.00
navy color dark-red color lemon color
favourite
Plus Size Scenic Print Cotton Sateen Shirt Dress
Plus
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KarenMillen

Plus Size Scenic Print Cotton Sateen Shirt Dress

  • Fabric: Woven
  • Neckline: Collared
  • Style: Shirt Dress
£74.00 £149.00
favourite
Hot Fix Draped Detail Jersey Maxi Dress
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KarenMillen

Hot Fix Draped Detail Jersey Maxi Dress

  • Length: Maxi
  • Neckline: Crew
  • Sleeve length: Cap Sleeve
£137.40 £229.00
favourite
Drapey Crepe Ruched Detail Maxi Dress
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KarenMillen

Drapey Crepe Ruched Detail Maxi Dress

  • Fabric: Acetate slinky
  • Length: Maxi
  • Neckline: Cowl
£89.40 £149.00
favourite
Premium Ruched Long Sleeved Jersey Maxi Dress
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KarenMillen

Premium Ruched Long Sleeved Jersey Maxi Dress

  • Length: Maxi
  • Neckline: Crew
  • Style: Maxi Dress
£89.40 £149.00
rust color chocolate color
favourite
Petite Scoop Neck Jersey Cotton Mix Maxi Dress
Petite
View
KarenMillen

Petite Scoop Neck Jersey Cotton Mix Maxi Dress

  • Design: Plain
  • Neckline: Scoop
  • Sleeve length: Strappy
£65.00 £129.00
favourite
Studded Ponte Jersey Midi Dress
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KarenMillen

Studded Ponte Jersey Midi Dress

  • Length: Midi
  • Sleeve length: Sleeveless
  • Style: Midi Dress
£64.00 £129.00
navy color chocolate color
favourite
Plus Size Essential Techno Short Sleeve Woven Shirt Dress With Gold Hardware
Plus
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KarenMillen

Plus Size Essential Techno Short Sleeve Woven Shirt Dress With Gold Hardware

  • Length: Maxi
  • Occasion: Daywear
  • SleeveLength: Short Sleeve
£77.40 £129.00
favourite
Petite Forever Ponte And Georgette Jersey Pleated Maxi Dress
Petite
View
KarenMillen

Petite Forever Ponte And Georgette Jersey Pleated Maxi Dress

  • Fabric: Jersey
  • Length: Maxi
  • Style: Maxi Dress
£139.00
red color black color
favourite
Cotton Ponte Jersey Ruffle Hem Maxi Dress
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KarenMillen

Cotton Ponte Jersey Ruffle Hem Maxi Dress

  • Detail: Ruffle
  • Length: Maxi
  • Sleeve length: Strappy
£83.30 £119.00
red color black color
favourite
Plus Size Embroidered Halterneck Pleated Midi Dress
Plus
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KarenMillen

Plus Size Embroidered Halterneck Pleated Midi Dress

  • Design: Embroidered
  • Detail: Embroidered
  • Length: Midi
£179.40 £299.00
favourite
Premium Embellished Caped Maxi Dress
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KarenMillen

Premium Embellished Caped Maxi Dress

  • Design: Fabric Interest
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
£239.40 £399.00
black color purple color
favourite
Petite Crystal Embellished Tie Detail Halter Neck Maxi Dress
Petite
View
KarenMillen

Petite Crystal Embellished Tie Detail Halter Neck Maxi Dress

  • Neckline: High Neck
  • Sleeve length: Sleeveless
  • Style: Maxi Dress
£99.00 £199.00
favourite
Premium Slinky Crepe Embellished Cut Out Maxi Dress
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KarenMillen

Premium Slinky Crepe Embellished Cut Out Maxi Dress

  • Design: Embellished
  • Neckline: Asymmetric
  • Sleeve length: Long Sleeve
£49.00 £139.00
black color nude color
favourite
Petite Drapey Crepe Maxi Dress With Gathered Cape Detail
Petite
View
KarenMillen

Petite Drapey Crepe Maxi Dress With Gathered Cape Detail

  • Detail: Ruched
  • Fabric: Polyester
  • Sleeve length: Sleeveless
£75.00 £149.00
favourite
Petite Scuba Crepe Crystal Bow Detail Midi Dress
Petite
View
KarenMillen

Petite Scuba Crepe Crystal Bow Detail Midi Dress

  • Detail: Backless
  • Neckline: Crew
  • Style: Midi Dress
£239.00
favourite
Petite Long Sleeve Slinky Drape Ruched Detail Maxi Dress
Petite
View
KarenMillen

Petite Long Sleeve Slinky Drape Ruched Detail Maxi Dress

  • Detail: Plain
  • Length: Maxi
  • Style: Maxi Dress
£77.40 £129.00
favourite
Plus Size Forever Soft Tailored Colour Block High Neck Pleated Midi Dress
Plus
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KarenMillen

Plus Size Forever Soft Tailored Colour Block High Neck Pleated Midi Dress

  • Neckline: High Neck
  • Sleeve length: Sleeveless
  • Style: Midi Dress
£119.40 £199.00
favourite
Blue Floral Off The Shoulder Shirred Woven Maxi Dress
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KarenMillen

Blue Floral Off The Shoulder Shirred Woven Maxi Dress

  • Design: Floral
  • Detail: Floral
  • Style: Maxi Dress
£56.00 £159.00
favourite
Plus Size Compact Stretch and Sheer Tailored Pencil Dress
Plus
View
KarenMillen

Plus Size Compact Stretch and Sheer Tailored Pencil Dress

  • Length: Midi
  • Sleeve length: Long Sleeve
  • Style: Pencil Dress
£249.00
favourite
Plus Size Premium Crystal Embellished Jersey Cowl Detail Top
Plus
View
KarenMillen

Plus Size Premium Crystal Embellished Jersey Cowl Detail Top

  • Design: Embellished
  • Detail: Embellished
  • Neckline: Cowl
£71.40 £119.00
favourite
Petite Stretch Crepe Jersey Plunge Neck Maxi Dress
Petite
View
KarenMillen

Petite Stretch Crepe Jersey Plunge Neck Maxi Dress

  • Design: Plain
  • Fabric: Polyester
  • Style: Maxi Dress
£107.40 £179.00
favourite
Plus Size Tailored Belted Midi Skirt Pencil Dress
Plus
View
KarenMillen

Plus Size Tailored Belted Midi Skirt Pencil Dress

  • Fabric: Polyester
  • Length: Midi
  • Style: Pencil Dress
£77.40 £129.00
Showing 40 of 515
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