Size guide - ADA - Swim Cap
| Measurement | size Small-Medium | size Large-Extra Large |
|---|---|---|
| Head circumference | Head circumference for size Small-Medium, 54 to 56 centimeters or 21 to 22 inches | Head circumference for size Large-Extra Large, 57 to 59 centimeters or 22.5 to 23 inches |
| Head length | Head length for size Small-Medium, 35 to 37 centimeters or 14 to 14.5 inches | Head length for size Large-Extra Large, 37.5 to 39 centimeters or 14.75 to 15.25 inches |