Decimal One Pound Diameter1983 – 2016: 22.5mm2016 to date: 23.43mm Weight1983 – 2016: 9.50g2016 to date: 8.75g Composition1983 – 2016: Nickel-Brass2016 to date: Outer: Nickel-Brass, Inner: Nickel-plated Brass Alloy Click here to download the QR code for this page