Size Charts for Under Armour Swimwear
Mens
| US Size | Chest (in.) | Waist |
| Small | 34 - 36 | 28 - 29 |
| Medium | 38 - 40 | 30 - 32 |
| Large | 42 - 44 | 34 - 36 |
| X-Large | 46 - 48 | 38 - 40 |
| XX-Large | 50 - 52 | 42 - 44 |
| XXX-Large | 54 - 56 | 46 - 48 |
Womens
| US Alpha Size | US Numeric Size | Bust (in.) | Waist | Hip |
| X-Small | 0 - 2 | 31 - 33 | 23 - 25 | 33 - 35 |
| Small | 4 - 6 | 33.5 - 35.5 | 25.5 - 27.5 | 35.5 - 37.5 |
| Medium | 8 - 10 | 36 - 38 | 28 - 30 | 38 - 40 |
| Large | 12 - 14 | 38.5 - 40.5 | 30.5 - 32.5 | 40.5 - 42.5 |
| X-Large | 16 | 41 - 43 | 33 - 35 | 43 - 45 |
| XX-Large | 18 | 44 - 46 | 36 - 38 | 46 - 48 |