With a total length of approximately 50 km and a width of 10 to 20 km, it stretches nearly diagonally from northwest to southeast, from the Euripus Strait, which connects it to the North Euboean Gulf, to the Petalies Gulf near Agia Marina in the south.
This description refers to a body of water that stretches diagonally across a significant distance, linking two distinct bodies of water: the Euripus Strait and the Petalies Gulf.