O'Neill Swimwear Sizing
Please Note: Not recommended for cup sizes D (D1) and up.
O'Neill Size US Junior Size Bra Size Bust (Inches) Waist (Inches) Hip (Inches)
XS 0/0, 1/2 32A 32-33 23.5-24.5 34-35
S 3/4, 5/6 34B 34-35 25.5-26.5 36-37
M 7/8, 9/10 34C-36B 36-37 27.5-29.5 38-39
L 11/12 36C-38B 37-38 29.5-30.5 40-41
XL 12/13 38B-38C 38-39 31.5-32.5 42
See our complete Lingerie Fitting Guide here.