Size Guide: The Back Nine Quarter-Zip
| Size | Chest Width (in) | Chest Width (cm) | Body Length (in) |
| XS | 19.5" | 49.5 cm | 26.5" |
| S | 21.0" | 53.3 cm | 27.5" |
| M | 22.5" | 57.2 cm | 28.5" |
| L | 24.0" | 61.0 cm | 29.5" |
| XL | 25.5" | 64.8 cm | 30.5" |
| 2XL | 27.0" | 68.6 cm | 31.5" |
| 3XL | 29.0" | 73.7 cm | 32.0" |
| 4XL | 31.0" | 78.7 cm | 32.5" |
These are garment measurements, not body measurements. For your chest size, measure around the fullest part of your chest and compare to the chart above. This is a performance fit — if you prefer a relaxed feel on the course, we recommend sizing up one.