St. Thomas A. Becket Custom MedalAvailable in Sterling Silver, 14kt Yellow Gold, and 14kt Gold Filled. Three sizes to choose from: Large: 1 x 3 4 inch Standard: 3 4 x 1 2 inch Charm: 1 2 x 1 4 inch Thomas, due to his friendship with King Henry II, was appointed Archbishop of Canterbury in 1162. However, they disagreed about the powers of the Church and the King, and which was more so. Thomas regularly clashed with Henry over such matters, and their friendship turned to rivalry,