It has an area of 122 km2 (without islands), length of 36.4 km, width of 7.9 km and a maximum depth of 18 m. There are 144 islands with total area of 14 km2 on the lake.
The lake's dimensions are approximately 122 km2 (not including the smaller island group), stretching for 36.4 km in length and 7.9 km in width, with a maximum depth of 18 m. The total area of the surrounding islands is 14 km2.