Bra

band/cup A B C D DD DDD
32 S S S S M M
34 S S S M M/L L
36 M M M M L L
38 L L L XL XL/XXL XXL
40 XL XL XL XXL XXL XXL
42 XXL XXL XXL 3XL 3XL 3XL

Underwear

Size WAIST(IN) WAIST(CM) HIP(IN) HIP(CM)
XS 23 1⁄2-25 1⁄2 60-65 31 1⁄2-35 1⁄2 80-90
S 26-28 1⁄2 66-72 36-37 1⁄2 91-95
M 29-31 1⁄2 73-80 38-40 96-102
L 32-35 81-88 40 1⁄2-43 103-109
XL 35-37 1⁄2 89-95 43 1⁄2-46 110-116
XXL 38-40 96-102 46 1⁄2-48 1⁄2 117-123
3XL 40 1⁄2-42 1⁄2 103-108 49-51 124-130

Sister Sizing

Every bra size has 'sister sizes': a family of alternate sizes that share cup volume, but have different band circumfrences.

How does it work? When band sizes go up, cup size goes down — and vice versa. So, if you’re a 36C, you might also like the fit of a 38B or 34D, depending on your preference.