The Life Gear Clamp Light is 4.5" long and the compact design makes this a great light to clip anywhere for hands free lighting. The clamp will fit most anywhere so you can use it for a light in your tent, as a book light or keep in your car in case of emergency. As with all of Life Gear's products, we incorporate safety features into our everyday products so we added a Red Glow Light & Emergency flasher in case you need to be seen.