Pocket Knives
Under five inches closed, and none of them feel small.
Every SHOOZIZ folder that closes under five inches. These are the ones that disappear in a front pocket: 4.45 to 4.78 inches closed, 7.64 to 8.27 open, D2, 14C28N or DC53 blades, liner lock, ceramic bearings. Small enough to forget, solid enough to use every day.