Sizing: RB5

Size Fighter's Weight Hand Circumference
S Up to 135 lb (60 kg) max 8.75" (22 cm)
M 135-154 lb (60-71 kg) max 9.75" (25 cm)
L 160-190 lb (75-85 kg) max 10.25" (26 cm)
XL Over 200 lb (91 kg) max 11" (28 cm)