These 5" × 5" sheets of solid Aluminum, Copper, and Brass are great for punching, embossing, rubbing, and decorating. 38 gauge Decorator Copper is Aluminum with Copper coating on one side. They are the perfect size for use with 4" × 4" Metal Smith Molds. - Art Metal Foil Sheets - Pkg of 12, 36 Gauge, AluminumArt Metal Foil Sheet, ALMN 36 GAGE 5X5 PK12 -