What size is guernsey?

The Bailiwick of Guernsey is a British Crown dependency in the English Channel off the coast of Normandy, France. The bailiwick is composed of 10 parishes, with a total land area of 78 sq km (30 sq mi). This includes the main island of Guernsey, which is 63 sq km (24 sq mi) in area, as well as the islands of Alderney, Sark, Herm and Jethou.