I bought two pair of these to wear when we go into churches and mosques when we travel, as we are often required to remove our shoes.  They fit me and my wife, who has a much smaller foot just fine.

I don't know why they call them "boat socks", that implies to me that they have a no-slip bottom, which they don't.  They are simply a nice pair of low cut socks that would be fine to wear with any pair of loafers, including ones you might wear on a boat.