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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
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
£62.00 £179.00
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
£104.30 £149.00
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
£125.30 £179.00
olive color light-blue color
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
£104.30 £149.00
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
£53.00 £179.00
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Scoop Neck Jersey Cotton Mix Maxi Dress
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KarenMillen

Scoop Neck Jersey Cotton Mix Maxi Dress

  • Detail: Belted
  • Sleeve length: Strappy
  • Style: Maxi Dress
£101.15 £119.00
ivory color lemon color red color
favourite
Studded Ponte Jersey Midi Dress
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KarenMillen

Studded Ponte Jersey Midi Dress

  • Design: Plain
  • Detail: Embellished
  • Length: Midi
£90.30 £129.00
navy color chocolate 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
£104.30 £149.00
dark-red color lemon 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
£119.00
black color red 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
£104.30 £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
£149.00
chocolate color rust color
favourite
Petite Scoop Neck Jersey Cotton Mix Maxi Dress
Petite
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KarenMillen

Petite Scoop Neck Jersey Cotton Mix Maxi Dress

  • Design: Plain
  • Neckline: Scoop
  • Sleeve length: Strappy
£90.30 £129.00
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
  • Fabric: Woven
  • Length: Maxi
£101.40 £169.00
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Plus Size Twill Collared Woven Maxi Dress
Plus
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KarenMillen

Plus Size Twill Collared Woven Maxi Dress

  • Length: Maxi
  • Occasion: Daywear
  • SleeveLength: Long Sleeve
£139.00
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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
£41.00 £139.00
black color nude color
favourite
Long Sleeve Jersey Maxi Dress
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KarenMillen

Long Sleeve Jersey Maxi Dress

  • Design: Plain
  • Fabric: Jersey
  • Neckline: High Neck
£41.00 £119.00
sage color ivory color red color
favourite
Petite Forever Ponte And Georgette Jersey Pleated Maxi Dress
Petite
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KarenMillen

Petite Forever Ponte And Georgette Jersey Pleated Maxi Dress

  • Design: Plain
  • Fabric: Jersey
  • Style: Maxi Dress
£139.00
favourite
Petite Crystal Embellished Tie Detail Halter Neck Maxi Dress
Petite
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KarenMillen

Petite Crystal Embellished Tie Detail Halter Neck Maxi Dress

  • Neckline: High Neck
  • Sleeve length: Sleeveless
  • Style: Maxi Dress
£139.30 £199.00
favourite
Velvet Bardot Woven Prom Midaxi Dress With Taffeta Bow
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KarenMillen

Velvet Bardot Woven Prom Midaxi Dress With Taffeta Bow

  • Fabric: Velvet
  • Neckline: Bardot
  • Style: Midaxi Dress
£139.30 £199.00
green color wine color black 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
£149.00
favourite
Crystal Embellished Cutwork Cape Detail Woven Maxi Dress
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KarenMillen

Crystal Embellished Cutwork Cape Detail Woven Maxi Dress

  • Detail: Embellished
  • Fabric: Woven
  • Sleeve length: Short Sleeve
£92.00 £369.00
black color purple color
favourite
Marbled Print Mesh Ruched Maxi Dress
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KarenMillen

Marbled Print Mesh Ruched Maxi Dress

  • Design: All Over Print
  • Fabric: Polyester
  • Neckline: Crew
£34.00 £99.00
favourite
Viscose Georgette Cape Sleeve Ruffle Woven Maxi Dress
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KarenMillen

Viscose Georgette Cape Sleeve Ruffle Woven Maxi Dress

  • Length: Maxi
  • Neckline: Round Neck
  • Style: Maxi Dress
£118.30 £169.00
favourite
Plus Size Trim Tailored Midi Pencil Dress
Plus
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KarenMillen

Plus Size Trim Tailored Midi Pencil Dress

  • Fabric: Polyester
  • Neckline: V Neck
  • Style: Pencil Dress
£167.30 £239.00
favourite
Petite Drapey Crepe Ruched Detail Maxi Dress
Petite
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KarenMillen

Petite Drapey Crepe Ruched Detail Maxi Dress

  • Design: Plain
  • Neckline: Cowl
  • Style: Maxi Dress
£104.30 £149.00
favourite
Cold Shoulder 3D Floral Applique Woven Maxi Dress
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KarenMillen

Cold Shoulder 3D Floral Applique Woven Maxi Dress

  • Detail: Applique
  • Fabric: Polyester
  • Style: Maxi Dress
£111.00 £319.00
black color hot-pink color
favourite
Compact Stretch Diamante Trim Detail Column Dress
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KarenMillen

Compact Stretch Diamante Trim Detail Column Dress

  • Detail: Embellished
  • Sleeve length: Sleeveless
  • Style: Midi Dress
£249.00
ivory color black color
favourite
Curve Sequin Belted Full Midi Dress
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KarenMillen

Curve Sequin Belted Full Midi Dress

  • Detail: Sequin
  • Length: Midi
  • Style: Full Skirted Dress
£139.30 £199.00
favourite
Plus Size Multi Fluid Stripe Cotton Mix Woven Halter Dress
Plus
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KarenMillen

Plus Size Multi Fluid Stripe Cotton Mix Woven Halter Dress

  • Design: Stripes
  • Fabric: Woven
  • Neckline: Halterneck
£118.30 £169.00
favourite
Plus Size Viscose Georgette Drop Hem Animal Print Woven Halterneck Maxi Dress
Plus
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KarenMillen

Plus Size Viscose Georgette Drop Hem Animal Print Woven Halterneck Maxi Dress

  • Neckline: Halterneck
  • Sleeve length: Sleeveless
  • Style: Maxi Dress
£139.30 £199.00
favourite
Crystal Embellished Woven Plunge Detail Maxi Dress
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KarenMillen

Crystal Embellished Woven Plunge Detail Maxi Dress

  • Fabric: Woven
  • Neckline: Plunge
  • Sleeve length: Long Sleeve
£107.00 £359.00
favourite
Plus Size Double Breasted Belted Tipped Tailored Midi Dress
Plus
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KarenMillen

Plus Size Double Breasted Belted Tipped Tailored Midi Dress

  • Length: Midi
  • Neckline: Collared
  • Sleeve length: Sleeveless
£160.30 £229.00
favourite
Plus Size Forever Structured Crepe Pleat Dress
Plus
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KarenMillen

Plus Size Forever Structured Crepe Pleat Dress

  • Length: Midi
  • SleeveLength: Short Sleeve
  • Style: Midi Dress
£219.00
favourite
Plus Size Petal Print Organza Maxi Shirt Dress
Plus
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KarenMillen

Plus Size Petal Print Organza Maxi Shirt Dress

  • Detail: All Over Print
  • Fabric: Woven
  • Style: Maxi Dress
£111.30 £159.00
favourite
Plus Size Puff Sleeve Metallic Textured Midi Dress
Tall
Plus
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KarenMillen

Plus Size Puff Sleeve Metallic Textured Midi Dress

  • Design: Metallic
  • Neckline: Round Neck
  • Style: Midi Dress
£90.30 £129.00
favourite
Plus Size Check Tailored Dress
Plus
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KarenMillen

Plus Size Check Tailored Dress

  • Design: Check
  • Fabric: Polyester
  • Style: Tailored Dress
£139.30 £199.00
favourite
Plus Size Viscose Georgette Rosette Ruffle Halterneck Maxi Dress
Plus
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KarenMillen

Plus Size Viscose Georgette Rosette Ruffle Halterneck Maxi Dress

  • Detail: Ruffle
  • Fabric: Woven
  • Sleeve length: Sleeveless
£132.30 £189.00
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

  • Length: Maxi
  • Neckline: Halterneck
  • Style: Maxi Dress
£118.30 £169.00
favourite
Plus Size Cotton Cutwork Balloon Sleeve Woven Midi Dress
Plus
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KarenMillen

Plus Size Cotton Cutwork Balloon Sleeve Woven Midi Dress

  • Design: Plain
  • Length: Midi
  • Style: Midi Dress
£209.30 £299.00
favourite
Crinkle Cold Shoulder Georgette Woven Maxi Dress
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KarenMillen

Crinkle Cold Shoulder Georgette Woven Maxi Dress

  • Fabric: Woven
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
£47.00 £159.00
Showing 40 of 483
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