Sailor's wool hat
What you're selling as a sailor's wool hat—I even called you to double-check—isn't a sailor's wool hat at all, but simply a navy blue wool hat.
A sailor's wool hat fits snugly all the way around the head, preventing the wind from catching in it and bothering the wearer during sailing maneuvers. I pointed out to your salesperson that it shouldn't be too long; I said a maximum of 24 cm. He said, "No, no, it's not too long."
To best fit the shape of our heads, a sailor's wool hat has six darts in the upper part of the head, not just four like the hat you sent me.