Original sentence: It measures approximately 16 km (10 miles) long and 11 km (7 miles) wide, giving  of coastline.Montserrat is a British overseas territory located in the Leeward Islands, part of the chain of islands called the Lesser Antilles in the Caribbean Sea.Montserrat was given its name by Christopher Columbus on his second voyage to the New World in 1493, after its namesake located in Catalonia
Edited sentence: Montserrat is a British overseas territory located in the Leeward Islands of the Lesser Antilles archipelago in the Caribbean Sea.The Island of Monserrat is approximately 16 km (10 miles) long and 11 km (7 miles) wide with  of coastline.The island was given its name by Christopher Columbus on his second voyage to the New World in 1493, after its namesake located in Catalonia