Ice Halo Flex-Fit Ball Caps have a comfortable elasticized stretch fit with protection on the sides and back of the cap hidden on the inside.
S/M - comfortably fits up to 22.5" has elastic stretch
L/XL - starts at 22.5" has elastic stretch
XL/XXL - starts at 24" has elastic stretch
Remember - when you first put on your new cap - or anytime it feels too tight - just pull on the brim/bill to make it larger. You may need to do this regularly the first few times you wear it.