True and Co.

regular
Size Full Bust Under Bust Bra Size
XS 31-33.5 24.5-26 30C 30D 32A 32B
S 33.75-35.5 26.5-28 32C 32D 34A 34B
M 35.75-37.5 28.5-30 34C 34D 36A 36B
L 37.75-39.5 30.5-32 36C 36D 38A 38B
XL 39.75-42 32.5-34.5 38C 38D 40A 40B

All Sizes in Inches Unless Otherwise Stated

bra measuring guide

Use the tips & visuals in this guide to take body measurements accurately & easily.

Don't have a fabric tape measure? Use a shoelace or a pant leg to measure. Then, lay it flat & use a ruler or tape measure to get a numerical measurement.

How to measure

  • Find your band size

    Wearing your best fitting bra, measure your underbust. Wrap tape measure around chest just under your bust (under bra band), make sure the tape is snug & level across your back.

    • If your underbust measurement is an odd number, add 5 to get your band size.

    • If your underbust measurement is an even number, add 4 to get your band size.

    • Example: Underbust of 29" (odd number)+5 = 34" Band Size

    • Example: Underbust of 30" (even number)+4 = 34" Band Size

  • Find your cup size

    Measure your bust by wrapping tape measure around the fullest part of your bust.Be sure the tape is snug & level across your back.

    (Bust measurement)-(Band size) = (Cup size)

    Example:(Bust of 35)-(Band of 32) = 3(C Cup)

Bra sizes (band size + cup size)

32A 34A 36A 38A 40A 42A 44A 46A 48A
30A 32B 34B 36B 38B 40B 42B 44B 46B
  30C 32C 34C 36C 38C 40C 42C 44C
      32D 34D 36D 38D 40D 42D
        32DD 34DD 36DD 38DD 40DD
        30DDD 32DDD 34DDD 36DDD 38DDD

Fit issues

Fit tip: 90% of your support should come from your band,which should be snug & level across your back.

  • Straps slip

    Tighten straps until they sit smoothly aganist the skin.

    If you tighten the straps fully & don't feel supported, your band may be too loose.

  • Straps dig in

    Loosen straps until they sit smoothly against the skin .

    If you loosen the straps & don't feel supported, your band may be too loose.

  • Side overflow

    If band fits comfortably, go up a cup size. or try a different bra style.

    Example: If you usually wear a 32B, try a 32C.

  • Cup overflow

    If band fits comfortably, go up a cup size,

    Example: If you usually wear a 32B, try a 32C.

  • Wire sits on breasts

    Band is too loose. Take your measurements following the directions in this guide. Or, if the cup size is accurate, try a sister size down from your current size.

    See sister size chart for more info.

  • Cups Gape

    If band fits comfortably, tighten straps. if that doesn't help, try going down a cup size.

    Example: If you usually wear a 34B, try a 34A.

  • Band digs in

    Your band size is too small. Try going up a band size,and down a cup size

    Example: If you usually wear a 34C, try a 36B.

  • Band rides up

    Your band size is too big. Go down a band size,and up a cup size

    Example: If you usually wear a 34C, try a 32D.

Sister sizes

A "sister size" is an alternate size in which the cup size stays the same, even though the band size & cup letter change.

To find your sister size, locate your usual size on the chart below. To sister size down, select the size underneath. To sister size up, select the size above.

Example: if your size is 34C, the sister size down is 32D, & the sister size up is 36B.

32A 34A 36A 38A 40A 42A 44A 46A 48A        
30B 32B 34B 36B 38B 40B 42B 44B 46B        
  30C 32C 34C 36C 38C 40C 42C 44C 46C 48C    
      32D 34D 36D 38D 40D 42D 44D 46D 48D  
        32DD 34DD 36DD 38DD 40DD 42DD 44DD 46DD 48DD
        30DDD 32DDD 34DDD 36DDD 38DDD 40DDD 42DDD 44DDD 46DDD