Brac Island belongs to the middle of the island, and is the largest among the Dalmatian islands. It is about 40 km and an average width of 10-12 km; total area of ​​395 km2.
Since the land is Brac channel (maximum depth 78 m) located 6-13 km. Westward of Solta by the narrow Split door, and to the south of the island of Hvar by the Hvar Channel (91 m deep). In the immediate vicinity of the mainland’s largest city on the eastern Adriatic coast, Split.