Men's O'Neill Wetsuit Size Chart
Women's O'Neill Wetsuit Size Chart
| Size | Height | Weight (lbs) | Chest (in) | Waist (in) |
| 1 | 2'10.5" - 3'2.5" | 25 - 30 | 19 - 21 | 18 - 20 |
| 2 | 3'2.5" - 3'6.5" | 30 - 35 | 20 - 22 | 19 - 21 |
| 3 | 3'6.5" - 3'10.5" | 35 - 40 | 21 - 23 | 20 - 22 |
| 4 | 3'10.5" - 4'1.5" | 40 - 55 | 23 - 25 | 20 - 22 |
| 6 | 4'1.5" - 4'4.5" | 50 - 65 | 24.5 - 26.5 | 21 - 23 |
| 8 | 4'4.5" - 4'7.5" | 60 - 75 | 26 - 28 | 22 - 24 |
| 10 | 4'7" - 4'10" | 75 - 90 | 28 - 30 | 24 - 26 |
| 12 | 4'10" - 5'1" | 90 - 105 | 29 - 31 | 25 - 27 |
| 14 | 5'1" - 5'4" | 105 - 120 | 31 - 33 | 27 - 29 |
| 16 | 5'4" - 5'7" | 120 - 135 | 33 - 35 | 28 - 30 |