| O'Neill product size | Height (cm) | Weight (kg) | Chest (cm) | Waist (cm) |
| 2 | 155-160 | 41-48 | 76-81 | 62-67 |
| 4 | 160-165 | 45-52 | 77-83 | 64-69 |
| 6S | 159-164 | 48-54 | 80-85 | 66-71 |
| 6 | 163-168 | 50-57 | 80-85 | 66-71 |
| 6T | 166-171 | 52-59 | 80-85 | 66-71 |
| 8S | 161-166 | 52-59 | 83-88 | 69-74 |
| 8 | 165-170 | 54-61 | 83-88 | 69-74 |
| 8T | 169-174 | 57-64 | 83-88 | 69-74 |
| 10S | 164-169 | 57-66 | 86-91 | 74-77 |
| 10 | 168-173 | 59-68 | 86-91 | 74-77 |
| 10T | 171-177 | 61-70 | 86-91 | 74-77 |
| 12 | 170-175 | 64-73 | 90-95 | 77-81 |
| 14 | 173-178 | 68-77 | 94-99 | 79-85 |
| 16 | 175-180 | 75-84 | 98-103 | 85-89 |
Chest:With you arms relaxed by your side, measure around the fullest part of you chest
Waist:Measure around your natural waistline.
Hips:Measure around the fullest part at the top of your hips.
Inseam:Using pants that fit well, measure from the crotch seam to the bottom of the leg.
| O'Neill product size | Height (cm) | Weight (kg) | Chest (cm) | Waist (cm) |
| 2XS | 168-173 | 52-59 | 90-93 | 70-72 |
| XS | 170-175 | 57-64 | 93-95 | 72-75 |
| SS | 166-171 | 59-68 | 95-99 | 75-79 |
| S | 173-178 | 61-70 | 95-99 | 75-79 |
| ST | 183-188 | 66-75 | 95-99 | 75-79 |
| MS | 169-174 | 66-75 | 99-104 | 79-84 |
| M | 175-180 | 70-77 | 99-104 | 79-84 |
| MT | 185-191 | 73-82 | 99-104 | 79-84 |
| LS | 171-177 | 73-82 | 104-110 | 84-89 |
| L | 178-183 | 77-86 | 104-110 | 84-89 |
| LT | 188-193 | 82-91 | 104-110 | 84-89 |
| XLS | 174-179 | 82-91 | 110-117 | 89-94 |
| XL | 180-185 | 86-95 | 110-117 | 89-94 |
| XLT | 191-196 | 91-100 | 110-117 | 89-94 |
| 2XL | 183-188 | 95-104 | 117-123 | 94-99 |
| 3XL | 183-191 | 104-113 | 123-130 | 99-112 |
| 4XL | 185-193 | 113-122 | 130-136 | 112-122 |
Chest:With you arms relaxed by your side, measure around the fullest part of you chest
Waist:Measure around your natural waistline.
Hips:Measure around the fullest part at the top of your hips.
Inseam:Using pants that fit well, measure from the crotch seam to the bottom of the leg.
| Age | Product size (EU) | Chest size (cm) | Waist size (cm) | Hip size (cm) |
| 1.5-2 | 92 | 54 | 49 | 54 |
| 2-3 | 98 | 55 | 50 | 56 |
| 3-4 | 104 | 56 | 51 | 58 |
| 5-6 | 116 | 58 | 53 | 62 |
| 7-8 | 128 | 62 | 56 | 66 |
| 9-10 | 140 | 66 | 59 | 70 |
| 11-12 | 152 | 72 | 64 | 76 |
| 13-14 | 164 | 78 | 69 | 82 |
| 14-15 | 176 | 84 | 74 | 88 |
Chest:With you arms relaxed by your side, measure around the fullest part of you chest
Waist:Measure around your natural waistline.
Hips:Measure around the fullest part at the top of your hips.
Inseam:Using pants that fit well, measure from the crotch seam to the bottom of the leg.