The highest break in snooker is generally regarded to be 147, however with a 16 red clearance it is theoretically 155. The first 16 red clearance in a tournament, the World Championships, no less was by Steve James, who scored 135 against Alex Higgins. There have been at least 3 breaks above 147 in various approved club completions etc. The highest of which is Wally West's 151 in a club handicap in 1976. We still await the elusive 155!