The island is in the northwest part of the Sibenik archipelago, separated from the mainland by a 20 meter wide sea canal at Tisno which is spanned by a 37 meter draw-bridge. The island covers an area of about 18.7 km?, and the highest point is the peak of Raduc at 125 meters above sea level.

The southwestern coastline is predominantly steep slopes divided by many sandy  caves. The island has lots of rocky beaches, as well as several sandy ones.