Nice little rubber mallet. The hammer head is small, about 2 inches in diameter and 4-5 inches from head to head. I couldn't find any head measurements, only grips, so I hope this helps. The weight obviously depends on the density of the rubber so doesn't really tell what size. The density is hard, certainly not soft rubber. One star off because the wooden handle is a bit rough. A little more loops could have been used. Almost like a raw wooden board. Not terrible, not the smoothest, but for a hand tool.