Original: It has a mean breadth of about 160 km (85 nm, 100 mi), although the Strait of Otranto, through which it connects at the south with the Ionian Sea, is only 45-55 nautical miles wide (85-100 km).
Simplified: The Strait of Otranto joins the Adriatic Sea and the Ionian Sea and is only 85 to 100 km wide.