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Size Charts

We take the guesswork out of choosing the right size. If you are unsure of exactly which size to order, there are a few steps you can follow to help ensure the best fit.

  • We use size ranges to help determine which sizing will work best for you based on numeric equivalents, so you can choose sizes XXS-XL based on what you wear from 0-18.
  • We also note when an item may run small/big or if you are between sizes, with direction to order a larger or smaller size.
  • We offer FITFINDER to assist with size selection by using your measurements, shape, and what you wear in other brands to find the right Boston Proper size for you. Simply click on find my size next to the FITFINDER icon above the size selection bar on any product page.

And just in case you need a different size, exchanges are always free.

For additional sizing information, please reference the charts below or contact our Customer Care team with any questions you may have.

Size Chart

0 2 4 6 8 10 12 14 16 18
If your bust is 31.5 32.5 33.5 34.5 35.5 36.5 38 39.5 41 43
If your waist is 24 25 26 27 28 29 30.5 32 33.5 35.5
If your hips are 34 35 36 37 38 39 40.5 42 43.5 45.5


  • Fitted: Very shaped, fit close to the body
  • Shaped: Skims the body
  • Effortless: Easy fit with slight shaping

Dress Lengths:

Description Inches
Mid thigh 35"
Above the knee 37"
At the knee 38" - 39"
Below the knee 40" - 41"
Midi 44" - 45"
Ankle 54" - 55"
Maxi 57" - 58"

Skirt Lengths:

Description Inches
Mid thigh 18"
Above the knee 20"
At the knee 22"
Below the knee 23" - 24"
Midi 28"
Ankle 38"
Maxi 40"

Measuring for the perfect size

Wearing a bra and panties, place the measuring tape comfortably around your body.
The measuring tape should be level and parallel to the floor.

  • Bust: Measure around the fullest part of the bust, arms relaxed at your side.
  • Waist: Measure around waist smallest point with tape slightly loosened for comfort.
  • Hips: With feet together, measure around the fullest part of hip and rear, usually 7" - 9" below the waist.
  • Inseam: Measure a similar style of pants that fit well. Measure from the crotch seam to the hem.