Measure the circumference of your head by placing a measuring tape or a string around the fullest part of your head, just above the ears, across the mid-forehead. Keep the tape horizontal and snug, but no tight.

If your measurement falls between sizes, choose the next largest size.

 

Size

circumference in cm

circumference in inches

S

55-56

21.7-22

M

57-58

22.4 -22.8

L

59-60

23.2-23.6