Leg-of-mutton is a hell of a name for a pair of sleeves, but so is leg-of-lamb and gigot.
These names were rendered because of the fullness that the sleeves hold at the upper arm along with the close-fittingness down the forearm and wrists, very similar to an untrimmed sheep. The trend first hit the scene back in the early 1820s, and faded off for a few years before surfacing again approximately around the late 1820s to early 1830s.
Despite their similarities, gigot sleeves are not to be confused with puffed sleeves. In all actuality it’s the close-fittingness on the forearm and wrist that makes the difference. This particular trend has come and go for over a century, but each time it has reappeared it has brought a new relevant modification with it. Check out the evolution below.