5 Sizes to choose from:

• Medium (M)

Head Width 142mm to 164mm  (5.6'' to 6.5'')
Head Length 180mm to 203mm  (7'' to 8'')
Head Circumference 55.0mm to 58.0mm  (21.65'' to 22.83'')

• Medium Broad (M/B)

Head Width  160mm to 175mm  (6.3'' to 6.9'')
Head Length 180mm to 203mm  (7.8'' to 8'')
Head Circumference 57.7mm to 60.5mm  (22.71'' to 23.8'')

• Medium Long (M/L)

Head Width 147mm to 164mm  (5.78'' to 6.45'')
Head Length 201'' to 218mm  (7.91'' to 8.58'')
Head Circumference 57.7mm to 62.0mm  (22.71'' to 24.4'')

• Large (L)

Head Width 160mm to 175mm  (6.29'' to 6.88'')
Head Length 201m to 218mm  (7.91'' to 8.58'')
Head Circumference 59.0mm to 62.2mm  (23.22'' to 24.48'')

• Extra Large (XL)

All head measurements exceeding size Large