At only 3.25", the Runt stun gun is pretty damn small (but still puts me to shame). They come in 350,000, 650,000 and 950,000 volt models and there's even a rechargeable 950 model that plugs directly into the wall via retractable plug. It'll operate about 300-500 times on a full charge, which is good because thats how many times I like to shock attackers. The rechargeable version costs $70, and all the other ones are cheaper. I'd been thinking about getting a stun gun for my girlfriend for some time, and I decided to go with one of these since it's nice and compact. She hates it. Mostly because I told her it was a handheld electrolysis hair remover. You should have seen her trying to get rid of her mustache, priceless.
The Runt - A Matchbook Sized Stun Gun [ohgizmo]