At present, the US penny, minted by the treasury, weighs 2.5 gm, has a diameter of 1.905 cm (0.75 in), with 0.155 cm thickness, and a plain edge. A 2010 penny weighs 2.5 gm. Since 1983, it's composition material has been copper plated zinc. Since 2010, the newly minted pennies, feature the Lincoln union shield. Interestingly, the cost of minting them in 2010 was greater than their actual value.