Size Chart

GELDEFENDER SIZE CAP SIZE HEAD CIRCUMFERENCE IN INCHES
Small 6 - 6 1/2 19 - 20 3/8
Medium 6 1/2 - 7 20 1/2 - 21 7/8
Large 7 - 7 1/2 22 - 23 3/8
X-Large 7 1/2 - 8 23 1/2 - 25