Herm is located in the English Channel, north-west of France and south of England. It is 1.5 miles (2.4 km) long and under 0.5 miles (0.80 km) wide; orientated north-south, with several stretches of sand along its northern coast. The much larger island of Guernsey lies to the west and Jersey to the south-east, and the smaller island of Jethou is just off the south-west coast.