Elbow Pads S (Straight Arm Circumference 29-32cm)Elbow Pad m (Straight Arm Circumference 33-36cm)Elbow Pad L (Straight Arm Circumference 37-41cm)Knee Pads S (Patella 30-34cm)Knee Pads m (Patella 35-38cm)Knee Pads L (Patella 39-44cm)Elbow Pads XL (Straight Arm 42-46cm)Knee Pads XL (Patella 43+)