Predecimal Penny Diameter1797: 36mm1806 – 1860: 34mm1860 – 1967: 31mm Weight1797: 28.30g1806 – 1807: 18.90g1825 – 1827, 1841 – 1860: 18.80g1831 – 1837: 18.61g1860 – 1967: 9.40g Composition1797 – 1860: copper1860 – 1967: bronze Click here to download the QR code for this page