Prada Boat Shoes - Men's 11[?]

Gently Used Prada Lace Up Boat Shoes. These are missing a clear size indicator. There is a "10" next to a serial number, but trying them on they are definitely not a 10. I'm thinking they would fit well as an 11 Ask for measurements if you want to double check! Oltermare+marea colorway per their Amazon listing. Several shades of blue with white accents. Prada logo on the sides. Made of real leather and calfskin. White soles. These have clearly been worn a few times, but still in overall great shape IMO. Guaranteed authentic.