1. Measure your width
With good posture, wrap a measuring tape under your arms around your back and take the measurement at fullest part of your chest. Be sure to keep the measuring tape parallel to the floor.
2. Measure your height
With good posture, measure from your waist to your shoulder as indicated in the image.
| (Inches) | Width | Height |
|---|---|---|
| XS | 17.5 | 25.5 |
| S | 18.5 | 26 |
| M | 19.5 | 26.5 |
| L | 20.5 | 27 |
| XL | 21.5 | 27.5 |
| XXL | 22.5 | 28 |