Flat topped, with rounded edges, this sight will not cut your hand, nor snag your gun case. Notch is indicated, not cut. Use this on a rifle or pistol with a 13/16" or 7/8" octagon barrel. Wax cast steel, the dovetail is about .735" long as cast, and the sight base is .530" wide. Height from the bottom of the dovetail to the top of the sight notch is 0.37".