The flag of Herm is white with a red St George's Cross with a banner of the arms of Herm in the canton; the arms are azure, between two dolphins argent a bend or bearing three cowled Benedictine monks sable. The ratio is 3:5. The flag was designed by the British vexillologist William Crampton. The arms of Herm was adopted in 1953. Around 1951 the island used a blue flag with the coat of arms of Guernsey near the hoist.