Twobirds Size Size (USA) Size (UK) Bust (In.) Waist (In.)
XS 0 - 2 4 - 6 30 - 32" 23 - 24"
S 4 - 6 8 - 10 32 - 36" 25 - 27"
M 8 - 10 12 - 14 37 - 39" 28 - 31"
L 12 - 14 16 - 18 40 - 44" 32 - 37"
XL 16 - 18 20 - 22 45 - 47" 38 - 40"
XXL 20 - 24 24 - 28 47 - 50+" 42 - 46"