300 Aluminum Business Card Blanks Click HERE for more information! Each made of metal etching blanks measures approx. 3.38 x 2.12 inches/ 86 x 54 mm long and wide, 0.21 mm/ 0.01 inch thick, suitable size for carrying and storage; The surface of the card is smooth and shiny, elegant and generous, and the edge is not rough, which will not hurt you.