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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
£179.00
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
£72.00 £179.00
favourite
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
£95.20 £119.00
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
£143.20 £179.00
olive color light-blue 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
£79.20 £99.00
favourite
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
£111.20 £139.00
favourite
Premium Slinky Crepe Embellished Cut Out Maxi Dress
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KarenMillen

Premium Slinky Crepe Embellished Cut Out Maxi Dress

  • Design: Embellished
  • Length: Maxi
  • Neckline: Asymmetric
£139.00
favourite
Long Sleeve Jersey Maxi Dress
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KarenMillen

Long Sleeve Jersey Maxi Dress

  • Design: Plain
  • Fabric: Jersey
  • Neckline: High Neck
£48.00 £119.00
sage color ivory color red color
favourite
Whitley Neill Premium Crystal Embellished Midi Dress
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KarenMillen

Whitley Neill Premium Crystal Embellished Midi Dress

  • Detail: Embellished
  • Fabric: Polyester
  • Sleeve length: Sleeveless
£183.20 £229.00
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
£103.20 £129.00
favourite
Crystal Embellished Cowl Back Maxi Dress
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KarenMillen

Crystal Embellished Cowl Back Maxi Dress

  • Fabric: Jersey
  • Length: Maxi
  • Neckline: High Neck
£104.00 £259.00
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
£56.00 £139.00
black color nude color
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Stripe Pleated Ruffle Sleeve Woven Maxi Dress
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KarenMillen

Stripe Pleated Ruffle Sleeve Woven Maxi Dress

  • Design: Plain
  • Sleeve length: Cap Sleeve
  • Style: Maxi Dress
£80.00 £199.00
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
£199.00
favourite
Petite Ponte And Georgette Jersey Pleated Maxi Dress
Petite
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KarenMillen

Petite Ponte And Georgette Jersey Pleated Maxi Dress

  • Design: Plain
  • Fabric: Jersey
  • Style: Maxi Dress
£139.00
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
£135.20 £169.00
favourite
Drape Sleeve Embellished Midaxi Dress
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KarenMillen

Drape Sleeve Embellished Midaxi Dress

  • Design: Fabric Interest
  • Neckline: Asymmetric
  • Sleeve length: Long Sleeve
£96.00 £319.00
favourite
Scuba Drama Ruffle Hem Woven Maxi Dress
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KarenMillen

Scuba Drama Ruffle Hem Woven Maxi Dress

  • Length: Maxi
  • Neckline: Crew
  • Style: Maxi Dress
£64.00 £159.00
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
£169.00
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

  • Design: Geo
  • Sleeve length: Long Sleeve
  • Style: Midi Dress
£95.20 £119.00
favourite
Plus Size Check Tailored Dress
Plus
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KarenMillen

Plus Size Check Tailored Dress

  • Design: Check
  • Fabric: Polyester
  • Style: Tailored Dress
£199.00
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
Plus Size Floral Print Twill Midi Dress
Plus
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KarenMillen

Plus Size Floral Print Twill Midi Dress

  • Design: Floral
  • Detail: Floral
  • Style: Midi Dress
£129.00
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
£183.20 £229.00
favourite
Drapey Crepe Bodice Detail Split Maxi Dress
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KarenMillen

Drapey Crepe Bodice Detail Split Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Fabric: Polyester
£75.00 £149.00
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
£80.00 £159.00
favourite
Petite Compact Stretch Square Neck Tailored Full Skirted Maxi Dress
Petite
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KarenMillen

Petite Compact Stretch Square Neck Tailored Full Skirted Maxi Dress

  • Design: Plain
  • Detail: Plain
  • Sleeve length: Short Sleeve
£159.20 £199.00
favourite
Jersey Crepe Asymmetric Neckline Maxi Dress
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KarenMillen

Jersey Crepe Asymmetric Neckline Maxi Dress

  • Fabric: Woven
  • Neckline: Asymmetric
  • Style: Maxi Dress
£69.00 £99.00
green color mango color black color cobalt color ivory 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
  • Occasion: Smart
  • Style: Midi Dress
£175.20 £219.00
favourite
Plus Size Stripe Collared Woven Midi Dress
Plus
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KarenMillen

Plus Size Stripe Collared Woven Midi Dress

  • Design: Stripes
  • Detail: Stripes
  • Style: Midi Dress
£143.20 £179.00
favourite
Plus Size Trim Detail Organdie Midi Shirt Dress
Plus
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KarenMillen

Plus Size Trim Detail Organdie Midi Shirt Dress

  • Design: Plain
  • Length: Midi
  • Neckline: Collared
£135.20 £169.00
favourite
Velvet Sleeveless Body With Taffeta Drop Waist Maxi Dress
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KarenMillen

Velvet Sleeveless Body With Taffeta Drop Waist Maxi Dress

  • Length: Maxi
  • Neckline: Crew
  • Sleeve length: Sleeveless
£54.00 £179.00
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
£64.00 £159.00
favourite
Plunge Ruched Twist Jersey Maxi Dress
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KarenMillen

Plunge Ruched Twist Jersey Maxi Dress

  • Design: Plain
  • Detail: Ruched
  • Sleeve length: Sleeveless
£57.00 £189.00
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
£64.00 £159.00
favourite
Petite Long Sleeve Jersey Maxi Dress
Petite
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KarenMillen

Petite Long Sleeve Jersey Maxi Dress

  • Fabric: Jersey
  • Neckline: High Neck
  • Style: Maxi Dress
£48.00 £119.00
favourite
Petite Crystal Embellished Cowl Back Maxi Dress
Petite
View
KarenMillen

Petite Crystal Embellished Cowl Back Maxi Dress

  • Detail: Plain
  • Fabric: Jersey
  • Length: Maxi
£104.00 £259.00
favourite
Jacquard Sleeveless Woven Maxi Dress
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KarenMillen

Jacquard Sleeveless Woven Maxi Dress

  • Design: Jacquard
  • Length: Maxi
  • Style: Maxi Dress
£45.00 £149.00
favourite
Viscose Linen Floral Print Woven Prom Dress
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KarenMillen

Viscose Linen Floral Print Woven Prom Dress

  • Design: Placement Print
  • Neckline: Square
  • Style: Maxi Dress
£175.20 £219.00
favourite
Plus Size Textured Satin Ruffle Detail Midi Dress
Plus
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KarenMillen

Plus Size Textured Satin Ruffle Detail Midi Dress

  • Detail: Ruffle
  • Sleeve length: Short Sleeve
  • Style: Midi Dress
£119.20 £149.00
Showing 40 of 492
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