With a length of  from north to south, and  at its widest point, the island covers an area of  and is separated from the shore west of it by a shallow lagoon, about  wide, only accessible by boat at high tide, which served in the 13th century as a sheltered anchorage.
The island's length spans from north to south, its widest point measures  square miles, and it is separated from the shore west of it by a shallow lagoon, approximately  miles wide, accessible only by boat during high tide.