Head Gear Sizing Chart
| Headgear Size | Head Measurements* |
| Small | 20.5" - 21.6" |
| Medium | 21.6" - 22.8" |
| Large | 22.8" - 24" |
| X-Large | Over 24" |
*Measurement is in inches. Measure circumference around head over the forehead area.
To measure: Take a tape measure and measure from the front of the forehead around to the back of the head 2.5" above the ears.