Measure the perimeter of your wrist: if you don’t have a measuring tape, take a rope or ribbon and surround your wrist, allowing some slack to suit your taste, then take said same rope to a ruler and measure the length in centimeters of the of your wrist´s perimeter.

FEMALE

SIZE
SML
16,5/17 cm17,5/18 cm18,5/19 cm

MALE

SIZE
SML
19/19,5 cm20/20,5 cm21/21,5 cm