Euboea (/juːˈbiːə/; Greek: Εύβοια, Evvia; Ancient Greek: Εὔβοια, Eúboia) is the second-largest Greek island in area and population, after Crete. The narrow Euripus Strait separates it from Boeotia in mainland Greece. In general outline it is a long and narrow, seahorse-shaped island; it is about 150 kilometres (93 mi) long, and varies in breadth from 50 kilometres (31 mi) to 6 kilometres (3.7 mi).