I too carry a knife. Total length under 3” (2.5 actually) and have done for years. Used to trade in antiques (Georgian furniture) and occasionally came across items that were easily collectable. My collection is, er, extensive with a favourite, below, that has never been used but is very useful if you know what I mean. A bone-handled silver Corn knife with the maker’s name Barret & Sons of Picadilly, circa 1900. Not much use for a leg, but should a tracheotomy become a necessity....