M80s were more like 1/8th of a stick, I think. My uncle bought quarter sticks of dynamite one time. Wow. Quite a bit bigger and louder than an M80, and M80s were LOUD! My dad's cousin blew off most of his thumb and parts of several fingers with one. It was old, and it had a flash fuse. He was planning to toss it, but it went off instantly. (Don't hold fireworks when you are lighting them.)

A couple of years ago my brother got some flat triangles from a guy on the side of the road. First thing I've seen in years that was like an M80. We put a flat soccer ball over one, and it went 50 feet in the air. Very fun.