This piece of copper sheet metal is 20 gauge (thick) and is 3" square.
Each piece of sheet is a raw material varying from one another with slight imperfections that can be buffed and polished as you work the metal.
I bought three of these sheets in different gauges. As a brand new stamper, I wanted an affordable way to try different metals and thicknesses. These sheets definitely fit that bill! They are large enough I can try several different stamps and different strike intensity. I can practice my stamps as well as filling in colors.