ENT The size of the Fenestra vestibule on an average is A 3.50 mm long and 2.50 mm wide B 3.25 mm long and 1.75 mm wide C 3.75 mm long and 1.50 mm wide D 4.00 mm long and 2.00 mm wide 💡 Explanation The size of the Fenestra vestibule on an average is ✓ Correct Answer: B. 3.25 mm long and 1.75 mm wide