They are made from heavy weight cotton/polyester drill fabric and have cotton bound edges. The diameter column in the table below states the diameter arm that each armband will fit.

 

size	Depth		length		To Fit Arm Size
	cms	inches	cms	inches	cms	inches
M	8.5	3 ¼	43	16 ¾	28 - 41	11 - 16
L	8.5	3 ¼	48	19 ¼	34.5 - 46	13 - 18
XL	8.5	3 ¼	53	21 ¼	39.5 - 51.25	15 - 20