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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
  • Neckline: Crew
  • Style: Midi Dress
$394.00
favourite
Studded Ponte Jersey Midi Dress
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KarenMillen

Studded Ponte Jersey Midi Dress

  • Detail: Embellished
  • Neckline: Crew
  • Style: Midi Dress
$284.00
favourite
Crystal Embellished Ruched Detail Sleeveless Midi Dress
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KarenMillen

Crystal Embellished Ruched Detail Sleeveless Midi Dress

  • Detail: Embellished
  • Neckline: Crew
  • Style: Midi Dress
$158.00 $394.00
favourite
Scoop Neck Jersey Cotton Mix Maxi Dress
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KarenMillen

Scoop Neck Jersey Cotton Mix Maxi Dress

  • Design: Plain
  • Fabric: Jersey
  • Neckline: Scoop
$262.00
ivory color lemon color
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
$394.00
olive color light-blue color
favourite
Marbled Print Mesh Ruched Maxi Dress
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KarenMillen

Marbled Print Mesh Ruched Maxi Dress

  • Neckline: Crew
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
$218.00
favourite
Plus Size Twill Collared Woven Maxi Dress
Plus
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KarenMillen

Plus Size Twill Collared Woven Maxi Dress

  • Length: Maxi
  • Neckline: Collared
  • Sleeve length: Long Sleeve
$306.00
favourite
Embellished Figure Form Bandage And Chiffon Sleeve Midi Dress
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KarenMillen

Embellished Figure Form Bandage And Chiffon Sleeve Midi Dress

  • Design: Fabric Interest
  • Fabric: Polyester
  • Style: Knitted Dress
$103.00 $416.00
favourite
Premium Slinky Crepe Embellished Cut Out Maxi Dress
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KarenMillen

Premium Slinky Crepe Embellished Cut Out Maxi Dress

  • Design: Embellished
  • Fabric: Cotton
  • Neckline: Asymmetric
$306.00
favourite
Long Sleeve Jersey Maxi Dress
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KarenMillen

Long Sleeve Jersey Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Fabric: Jersey
$106.00 $262.00
sage color ivory color red color
favourite
Petite Scoop Neck Jersey Cotton Mix Maxi Dress
Petite
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KarenMillen

Petite Scoop Neck Jersey Cotton Mix Maxi Dress

  • Detail: Plain
  • Length: Maxi
  • Sleeve length: Strappy
$284.00
favourite
Premium Slinky Crepe Embellished Cut Out Maxi Dress
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KarenMillen

Premium Slinky Crepe Embellished Cut Out Maxi Dress

  • Design: Embellished
  • Fabric: Cotton
  • Neckline: Asymmetric
$123.00 $306.00
black color nude color
favourite
Tulle Layered Long Sleeve Maxi Dress
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KarenMillen

Tulle Layered Long Sleeve Maxi Dress

  • Design: Plain
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
$198.00 $394.00
favourite
Hammered Satin With Lace Trim Long Sleeve Hanky Hem Dress
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KarenMillen

Hammered Satin With Lace Trim Long Sleeve Hanky Hem Dress

  • Design: Plain
  • Neckline: Round Neck
  • Sleeve length: Long Sleeve
$99.00 $328.00
favourite
Baroque Balloon Sleeve Maxi Dress
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KarenMillen

Baroque Balloon Sleeve Maxi Dress

  • Design: All Over Print
  • Fabric: Woven
  • Sleeve length: Long Sleeve
$176.00 $438.00
favourite
Stripe Pleated Ruffle Sleeve Woven Maxi Dress
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KarenMillen

Stripe Pleated Ruffle Sleeve Woven Maxi Dress

  • Design: Plain
  • Length: Maxi
  • Neckline: High Neck
$176.00 $438.00
favourite
Whitley Neill Premium Crystal Embellished Midi Dress
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KarenMillen

Whitley Neill Premium Crystal Embellished Midi Dress

  • Detail: Embellished
  • Fabric: Polyester
  • Neckline: Scoop
$504.00
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

  • Design: Plain
  • Detail: Embellished
  • Length: Maxi
$438.00
favourite
Crystal Embellished Cowl Back Maxi Dress
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KarenMillen

Crystal Embellished Cowl Back Maxi Dress

  • Fabric: Jersey
  • Sleeve length: Long Sleeve
  • Style: Maxi Dress
$229.00 $570.00
favourite
Petite Ponte And Georgette Jersey Pleated Maxi Dress
Petite
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KarenMillen

Petite Ponte And Georgette Jersey Pleated Maxi Dress

  • Detail: Pleated
  • Neckline: Crew
  • Sleeve length: Sleeveless
$306.00
favourite
Viscose Georgette Cape Sleeve Ruffle Woven Maxi Dress
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KarenMillen

Viscose Georgette Cape Sleeve Ruffle Woven Maxi Dress

  • Design: Plain
  • Detail: Ruffle
  • Neckline: Round Neck
$372.00
favourite
Drape Sleeve Embellished Midaxi Dress
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KarenMillen

Drape Sleeve Embellished Midaxi Dress

  • Detail: Embellished
  • Fabric: Woven
  • Sleeve length: Long Sleeve
$211.00 $702.00
favourite
Plus Size Check Tailored Dress
Plus
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KarenMillen

Plus Size Check Tailored Dress

  • Design: Check
  • Neckline: Asymmetric
  • Style: Tailored Dress
$438.00
favourite
Compact Stretch Diamante Trim Detail Column Dress
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KarenMillen

Compact Stretch Diamante Trim Detail Column Dress

  • Detail: Embellished
  • Neckline: High Neck
  • Sleeve length: Sleeveless
$548.00
ivory color black color
favourite
Plus Size Spot Print Pleated Slub Organdie Peplum Woven Maxi Dress
Plus
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KarenMillen

Plus Size Spot Print Pleated Slub Organdie Peplum Woven Maxi Dress

  • Length: Maxi
  • Neckline: Strappy
  • Style: Maxi Dress
$438.00
favourite
Plus Size Floral Print Twill Midi Dress
Plus
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KarenMillen

Plus Size Floral Print Twill Midi Dress

  • Fabric: Woven
  • Neckline: Round Neck
  • Style: Midi Dress
$284.00
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

  • Fabric: Polyester
  • Neckline: Collared
  • Sleeve length: Sleeveless
$504.00
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
$372.00
favourite
Plus Size Geo Print Hammered Satin Tie Waist Woven Midi Dress
Plus
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KarenMillen

Plus Size Geo Print Hammered Satin Tie Waist Woven Midi Dress

  • Fabric: Woven
  • Neckline: Collared
  • Style: Midi Dress
$262.00
favourite
Pleated Maxi Dress
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KarenMillen

Pleated Maxi Dress

  • Fabric: Woven
  • Sleeve length: Sleeveless
  • Style: Maxi Dress
$198.00 $394.00
favourite
Jacquard Long Sleeve Hanky Hem Woven Maxi Dress
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KarenMillen

Jacquard Long Sleeve Hanky Hem Woven Maxi Dress

  • Detail: Jacquard
  • Fabric: Woven
  • Length: Maxi
$141.00 $350.00
favourite
Cotton Ponte Jersey Ruffle Hem Maxi Dress
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KarenMillen

Cotton Ponte Jersey Ruffle Hem Maxi Dress

  • Detail: Ruffle
  • Neckline: Scoop
  • Style: Maxi Dress
$262.00
black color red color
favourite
Plus Size Structured Crepe Forever Pleat Dress
Plus
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KarenMillen

Plus Size Structured Crepe Forever Pleat Dress

  • Length: Midi
  • Neckline: V Neck
  • Sleeve length: Short Sleeve
$482.00
favourite
Plus Size Stripe Collared Woven Midi Dress
Plus
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KarenMillen

Plus Size Stripe Collared Woven Midi Dress

  • Design: Stripes
  • Fabric: Woven
  • Sleeve length: Short Sleeve
$394.00
favourite
Plus Size Trim Detail Organdie Midi Shirt Dress
Plus
View
KarenMillen

Plus Size Trim Detail Organdie Midi Shirt Dress

  • Design: Plain
  • Length: Midi
  • Neckline: Collared
$372.00
favourite
Feather Crystal Embellished Maxi Dress
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KarenMillen

Feather Crystal Embellished Maxi Dress

  • Fabric: Polyester
  • Length: Maxi
  • Sleeve length: Long Sleeve
$277.00 $922.00
favourite
Petite Compact Stretch Square Neck Tailored Full Skirted Maxi Dress
Petite
View
KarenMillen

Petite Compact Stretch Square Neck Tailored Full Skirted Maxi Dress

  • Detail: Plain
  • Length: Midi
  • Style: Maxi Dress
$438.00
favourite
Plunge Ruched Twist Jersey Maxi Dress
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KarenMillen

Plunge Ruched Twist Jersey Maxi Dress

  • Detail: Ruched
  • Fabric: Jersey
  • Sleeve length: Sleeveless
$125.00 $416.00
favourite
Jersey Crepe Asymmetric Neckline Maxi Dress
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KarenMillen

Jersey Crepe Asymmetric Neckline Maxi Dress

  • Detail: Asymmetric
  • Neckline: Asymmetric
  • Sleeve length: Sleeveless
$152.00 $218.00
green color mango color black color cobalt color ivory color red color
favourite
Mono Geo Silk Cotton Woven Shirt Dress
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KarenMillen

Mono Geo Silk Cotton Woven Shirt Dress

  • Design: Patterned
  • Detail: Plain
  • Length: Maxi
$211.00 $526.00
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