Small:

• Head circumference (cms): 55 cms

• US Hat size:6 7/8

• in inches: 21.65"

Medium:

• Head circumference (cms): 57 cms

• US Hat size: 7 1/8

• in inches: 22.44”

Large:

• Head circumference (cms): 59 cms

• US Hat size: 7 3/8

• in inches: 23.33”

Note: All hats come with an adjustable band for a custom fit.