EXTRA SMALL
US SIZE: 4 – 5
UK SIZE: H – J
DIAMETER: 15 – 16 MM
CIRCUMFERENCE: 47 – 49 MM

SMALL
US SIZE: 5.5 – 6.5
UK SIZE: K – M
DIAMETER: 16 – 17 MM
CIRCUMFERENCE: 50 – 53 MM

MEDIUM
US SIZE: 7 – 8
UK SIZE: N – P
DIAMETER: 17 – 18 MM
CIRCUMFERENCE: 53 – 57 MM

LARGE
US SIZE: 8.5 – 9.5
UK SIZE: Q – R
DIAMETER: 18 – 19 MM
CIRCUMFERENCE: 58 – 60 MM

EXTRA LARGE
US SIZE: 10 – 11
UK SIZE: S – T
DIAMETER: 19 – 20 MM
CIRCUMFERENCE: 61 – 64 MM

DOUBLE XL
US SIZE: 11 – 13
UK SIZE: U – Z
DIAMETER: 20 – 22 MM
CIRCUMFERENCE: 65 – 69 MM