The place where I bought this from a few years ago was Marburg Auctions which specializes in authentic Native American Indian Artifacts. See last 2 pictures showing this Celt. That paper mentions that this Celt is 2 1/2 inches long which it is but since the front end is angled slightly it is 2 1/2 inches to 2 11/16 inches long. The weight is 3.1 ounces, the thickness is 7/8 inches at the thickest spot. The width tapers from 3/4 inches to 1 7/16 inches. This Celt was found in Delaware County Pennsylvania. It does not say what collector had this. It is a very nice and a great piece.