Product Specifications: 

● HIGH QUALITY Merino Wool Arm Sleeve: 87% Merino wool, 13% Nylon.

● Fabric: 17.5 micron merino wool.

● Size:  S: 26cm Upper arm circumference, 48cm Length.

            L: 27cm Upper arm circumference, 51cm Length.

● How to measure upper arm circumference

1. Relaxing muscles, then Arm bent 90 degrees.
2. measuring the maximum circumference of the biceps muscle circumference.

● TIPS:
1. Arm sleeves do not have elasticity, it should be purchased according to the size chart.
2. The measurement of arm circumference should be done when the arm is relaxed.