Underdog Polo Size Chart
| CHEST (ALL-ROUND) | BODY | SHOULDER | US | ||
| XS | 40.2 | 25.8 | 17.9 | 2 | |
| S | 41.7 | 26.6 | 18.7 | 4 | |
| M | 43.3 | 27.4 | 19.5 | 6 | |
| L | 44.9 | 28.1 | 20.3 | 8 | |
| XL | 46.5 | 28.9 | 21.1 | 10 | |
| 2XL | 48 | 29.8 | 21.9 | 12 |
| CHEST (ALL-ROUND) | BODY | SHOULDER | US | ||
| XS | 40.2 | 25.8 | 17.9 | 2 | |
| S | 41.7 | 26.6 | 18.7 | 4 | |
| M | 43.3 | 27.4 | 19.5 | 6 | |
| L | 44.9 | 28.1 | 20.3 | 8 | |
| XL | 46.5 | 28.9 | 21.1 | 10 | |
| 2XL | 48 | 29.8 | 21.9 | 12 |
