When rangefinders were first introduced, many were quite large and bulky. While effective, they were kind of a pain to tote around while hunting. Nowadays, most laser rangefinders are quite small, and some could even be considered tiny. Whichever you choose, just make sure it fits your hand well and places your finger right next to the button that activates the laser. If you have large hands, the smallest units might not be right for you. If you do buy a tiny rangefinder, be sure and choose a place in your pack, or wherever you carry your gear, and always put it back in that place. If you don't, you're liable to spend time looking for your rangefinder when you should be concentrating on other, more important things while out in the field.