Please measure around the wrist, this is the wrist circumference (as shown in the image below)

Size Guide
Size  US Wrist Circumference  EU Wrist Circumference
 S/M 5.9 – 6.7 inch 15 – 17 cm
 M/L 6.7 – 8.2+ inch 17 – 21+ cm

* The measurements in the guide are based on measurements taken directly from the body, not the garment. If your measurement is between two sizes, we recommend you select the larger size.