Silver Graduation Oval keyring Mortar Board. The Graduation Keyring is a new design for 2020. The Silver Oval Keyring has a nickel plated split ring and is presented in a gift box The Silver Oval Graduation Keyring measures approx 3.6cm x 2.3cm ( excluding split ring) and can be engraved. The Graduation Keyring is also fully hallmarked but has small hallmarks at and bottom of the keyring. Our Silver Keyrings are manufactured in the UK by our silversmiths.