O'NEILL Size Chart
MENS CLOTHING SIZES
Standard Size XS S M L XL XXL
Chest 30-32 34-36 38-40 42-44 46-48 50-52
Waist 22-24 26-28 30-32 34-36 38-40 42-44
Inseam 28-29 28-29 29-30 30-31 32-33 33-34
Belt 30 32 34 36 38 40
Europe 42 44-46 46-50 52 54-56 58-60
UK -- 34-36 38-40 42-44 46-48 50-52
Japan -- XS S M L LL

How to measure:

CHEST:
With your arms relaxed at your sides, have someone measure under your arms and over the fullest part of your chest.

WAIST:
Bend to one side. The crease that appears is your natural waist. Without pulling tape too tight, measure around waistline.

HIP:
With your feet together, measure around the fullest part of your body at the top of your legs.

INSEAM:
Take a pair of pants that fit you well and lay them flat. Measure from the inside crotch seam to the bottom hem.

RISE:
Measure from the crotch to the top of the waistband.

ACCESSORIES - HATS / BELTS:
For belts, measure over waistband of pants. For hats, measure your head at the point where your hat would fit comfortably.

WOMENS CLOTHING SIZES
Standard Size XS S M L XL
U.S Size 00-0 1-3 5-7 9-11 13
Bust 29.5-31 32-33 34-35 36-37.5 39
Waist 21.5-23 24-25 26-27 28-29.5 31
Hip 23-23 34-35 36-37 38-39.5 41
Europe 24-26 28-30 32-34 36-38 40
UK 2-4 6-8 10 12-14 16
Japan 3-5 5-7 9 11-13 15

How to measure:

CHEST:
With your arms relaxed at your sides, have someone measure under your arms and over the fullest part of your chest.

WAIST:
Bend to one side. The crease that appears is your natural waist. Without pulling tape too tight, measure around waistline.

HIP:
With your feet together, measure around the fullest part of your body at the top of your legs.

INSEAM:
Take a pair of pants that fit you well and lay them flat. Measure from the inside crotch seam to the bottom hem.

RISE:
Measure from the crotch to the top of the waistband.

ACCESSORIES - HATS / BELTS:
For belts, measure over waistband of pants. For hats, measure your head at the point where your hat would fit comfortably.

WOMENS SWIMWEAR SIZING
Standard Size XS S M L XL
U.S Size 00-0 1-3 5-7 9-11 13
Bust 29.5-31 32-33 34-35 36-37.5 39
Waist 21.5-23 24-25 26-27 28-29.5 31
Hip 23-23 34-35 36-37 38-39.5 41
European Sizes 24-26 28-30 32-34 36-38 40

Glossary

TOPS
Halter Top:

Features a thicker strap that ties behind the neck for more support than a triangle top. Also, a halter generally offers more coverage than a triangle top.

Triangle Top:
Features a triangular shape with less coverage than that of a halter.

Tankini:
Great alternative to a triangle or halter for someone who wants complete coverage.

Bandeau (Top):
Bandeaus have a tube design that is usually fastened at the back. Some designs have straps that tie around the neck, while others are left strapless.

Butterfly Top:
The butterfly top is a favorite because of it's flattering appearance on large and small busts alike.

Sweetheart Top:
Sweetheart bikini tops offer the best of both worlds - superior coverage with a sexy and playful look.

BOTTOMS
Full Bikini Bottom:

Full bottoms feature the most coverage and are great for most watersports.

Boyshort Bikini Bottom:
Boyshort bikini bottoms give moderate coverage and are typically mid to low rise.

Brazilian Bikini Bottom:
Brazilian bikinis offer slim coverage and a low rise.

SHOES & SANDALS
Standard Size
U.S Mens 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 13
U.S Womens 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 -- -- -- --
European 36 36.5 37 38 38.5 39 40 40.5 41 42 42.5 43 44 44.5 45 45.5 47
UK 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 12
U.S. Mens (generic) -- -- -- S M L XL --
U.S. Womens (generic) -- -- -- S M L -- -- -- --