These 3mm neoprene cuffs from Grundens are made to seal up the area between you jacket and gloves. The stretch characteristics of the neoprene provide for a snug fit. The large size (200L) have a 10" length, a forearm circumference of 10.5" and a 8" wrist circumference. The medium size (200M) have a 9.5" length, a forearm circumference of 10" and a 7" wrist circumference. Note these measurements are for general information and were taken when the items were un-stretched. 1 Pair- 2 cuffs.