How big are the Scilly Isles?

The Isles of Scilly are a chain of islands located off the southwestern tip of Cornwall, England, in the United Kingdom. The archipelago consists of five inhabited islands and over 140 uninhabited islands, islets and rocks. The total land area of the Isles of Scilly is approximately 16.3 square kilometres (6.3 square miles). The largest island, St Mary's, accounts for about two-thirds of the total land area, with an area of approximately 10.4 square kilometres (4.0 square miles). The other inhabited islands are Tresco, Bryher, St Martin's, and St Agnes.