O'Neill Men's Wetsuit Size Chart

How to measure:
  1. Chest: With your arms relaxed by your side, measure around the fullest part of your chest.
  2. Waist: Measure around your natural waistline.

If your measurements border on the top end of your chosen size, go for the next size up.

SIZE HEIGHT (in) WEIGHT (lbs) CHEST (in) WAIST (in)
XS 5'7" - 5'9" 125 - 140 36 1/2 - 37" 1/2 28 1/2 - 29" 1/2
S 5'8" - 5'10" 135 - 155 37 1/2 - 39" 29 1/2 - 31"
ST 6' - 6'2" 145 - 165 37 1/2 - 39" 29 1/2 - 31"
MS 5'6 1/2" - 5'8 1/2" 145 - 165 39 - 41" 31 - 33"
M 5'9" - 5'11" 155 - 170 39 - 41" 31 - 33"
MT 6'1" - 6'3" 160 - 180 39 - 41" 31 - 33"
LS 5'7 1/2" - 5'9 1/2" 160 - 180 41 - 43" 1/2 33 - 35"
L 5'10" - 6' 170 - 190 41 - 43" 1/2 33 - 35"
LT 6'2" - 6'4" 180 - 200 41 - 43" 1/2 33 - 35"
XLS 5'8 1/2" - 5'10 1/2" 180 - 200 43 1/2 - 46" 35 - 37"
XL 5'11" - 6'1" 190 - 210 43 1/2 - 46" 35 - 37"
XLT 6'3 - 6'5 200 - 220 43 1/2 - 46" 35 - 37"
2XLS 5'9 1/2" -5'11 1/2" 200 - 220 46 - 48" 1/2 37- 39"
2XL 6' - 6'2" 210 - 230 46 - 48" 1/2 37 - 39"
3XL 6' - 6'3" 230 - 250 48 1/2 - 51" 39 - 44"
4XL 6'1" - 6'4" 250 - 270 51 - 53" 1/2 44 - 48"