| Chest Circumference (in) | Chest Circumference (cm) | |
| 2XS | 35 - 36" | 89 - 91.5cm |
| XS | 36 - 37" | 91.5 - 94cm |
| S | 37 - 38" | 94 - 96.5cm |
| M | 38 - 39" | 96.5 - 99cm |
| L | 39 - 42" | 99 - 107cm |
| XL | 42 - 44" | 107 - 112cm |
| 2XL | 44 - 46" | 112 - 117cm |
| 3XL | 46 - 48" | 117 - 122cm |
| 4XL | 48 - 50" | 122 - 127cm |
| 5XL | 50 - 52" | 127 - 132cm |
Note: All measurements are provided by the manufacturer and may vary depending on how measurements are acquired. Giordana recommends that new purchasers of Giordana jersey's and/or those between sizes go up one size.