OneOne Size Chart

OneOne size chart, plus how to measure and common sizing questions.

OneOne Swimwear Fit Guide

  • Cheeky fitCheeky
  • Extra fitExtra
  • Full fitFull
  • Skimpy fitSkimpy

OneOne Swimwear Size Chart

US / Canada

Tops

Size XS S M L XL
Cup A A-B B-C C-D D-DD
Bust (in) 31-31.1- 31.4-32.6 33-34.2 34.6-35.8 36.2-37.4
Under-Bust (in) 26.7-27.9 28.3-29.5 29.9-31.1 31.4-32.6 33-34.2

Bottoms

Waist (in) 23.2-24.4 24.8-25.9 26.3-27.5 27.9-29.1 29.5-30.7
Hip (in) 35-36.2 36.6-37.7 38.1-39.3 39.7-40.9 41.3-42.5

International

Tops

Cup A A-B B-C C-D D-DD
Bust (cm) 76-79 80-83 84-87 88-91 92-95
Under-Bust (cm) 68-71 72-75 76-79 80-83 84-87

Bottoms

Waist (cm) 59-62 63-66 67-70 71-74 75-78
Hip (cm) 89-92 93-96 97-100 101-104 105-108
Size chart supplied by brand.

How to measure: bust at the fullest point, under bust where a band sits, waist at the narrowest point, hips at the fullest point.

Full measuring guide

OneOne sizing FAQ

How do I find my OneOne size?

Measure your bust, waist and hips, or check your usual size, and compare with the OneOne chart above.

What if my measurements fall between two sizes?

Contact us with your measurements and the style you like and we'll help you choose.