A Cuff is the lower edge of the sleeve of a garment covering the arms. In U.S. usage the word may also refer to the leg of a pair of trousers. Cuffs may be turned back, or a separate band of material may be sewn on or worn separately. The cuff may show an ornamental border, or have an addition of lace or other trimming. The functional purpose of turned cuffs is to protect the material from fraying and, when frayed, to allow the cuffs to be repaired or replaced without major changes to the garment.
Turned cuffs are mainly used on men's shirts; types include french cuffs and button cuffs (also called barrel cuffs.) Lieutenant-General David Henderson originally proposed that Royal Air Force officers use a combination of British Army and Royal Navy ranks. However, the War Office argued that the RAF should have its own ranks and the Admiralty opposed any use of their rank titles.