Under Armour Men and Boys Size Guide
| UNDER ARMOUR MEN'S FOOTWEAR | ||||
| US MEN | INCHES | CM | EURO | UK |
| 7 | 9⅞ | 25 | 40 | 6 |
| 7.5 | 10 | 25.5 | 40.5 | 6.5 |
| 8 | 10⅛ | 26 | 41 | 7 |
| 8.5 | 10⅜ | 26.5 | 42 | 7.5 |
| 9 | 10⅝ | 27 | 42.5 | 8 |
| 9.5 | 10¾ | 27.5 | 43 | 8.5 |
| 10 | 11 | 28 | 44 | 9 |
| 10.5 | 11⅛ | 28.5 | 44.5 | 9.5 |
| 11 | 11⅜ | 29 | 45 | 10 |
| 11.5 | 11⅝ | 29.5 | 45.5 | 10.5 |
| 12 | 11¾ | 30 | 46 | 11 |
| 12.5 | 12 | 30.5 | 47 | 11.5 |
| 13 | 12⅛ | 31 | 47.5 | 12 |
| 13.5 | 12¼ | 31.5 | 48 | 12.5 |
| 14 | 12⅝ | 32 | 48.5 | 13 |
| 14.5 | 12⅞ | 32.5 | 49 | 13.5 |
| 15 | 13 | 33 | 49.5 | 14 |
| 15.5 | 13⅛ | 33.5 | 50 | 14.5 |
| 16 | 13¼ | 34 | 50.5 | 15 |
| UNDER ARMOUR BOYS FOOTWEAR | |||
| CM | EURO | UK | US YOUTH |
| 8 | 17.5 | 1.5 | 2K |
| 9 | 18.5 | 2.5 | 3K |
| 10 | 19.5 | 3.5 | 4K |
| 11 | 21 | 4.5 | 5K |
| 12 | 22 | 5.5 | 6K |
| 13 | 23.5 | 6.5 | 7K |
| 14 | 25 | 7.5 | 8K |
| 15 | 26 | 8.5 | 9K |
| 16 | 27 | 9.5 | 10K |
| 16.5 | 27.5 | 10 | 10.5K |
| 17 | 28 | 10.5 | 11K |
| 17.5 | 29 | 11 | 11.5K |
| 18 | 29.5 | 11.5 | 12K |
| 18.5 | 30 | 12 | 12.5K |
| 19 | 31 | 12.5 | 13K |
| 20 | 32 | 13.5 | 1 |
| 20.5 | 33 | 1 | 1.5 |
| 21 | 33.5 | 1.5 | 2 |
| 21.5 | 34 | 2 | 2.5 |
| 22 | 35 | 2.5 | 3 |
| 22.5 | 35.5 | 3 | 3.5 |
| 23 | 36 | 3.5 | 4 |
| 23.5 | 36.5 | 4 | 4.5 |
| 24 | 37.5 | 4.5 | 5 |
| 24.5 | 38 | 5 | 5.5 |
| 25 | 38.5 | 5.5 | 6 |
| 25.5 | 39 | 6 | 6.5 |
| 26 | 40 | 6 | 7 |