Zephyr Size Guide
| International Size | XXS | XS | S | M | L | XL | 2XL |
| Men's Chest to Fit (inches) | 30/32 | 33/35 | 36/38 | 37/39 | 40/42 | 42/44 | 46/48 |
| Women's | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
| International Size | XXS | XS | S | M | L | XL | 2XL |
| Men's Chest to Fit (inches) | 30/32 | 33/35 | 36/38 | 37/39 | 40/42 | 42/44 | 46/48 |
| Women's | 6 | 8 | 10 | 12 | 14 | 16 | 18 |