Vintage Brooks Brothers hat sizes

Hello all! I am wondering if Brooks Brothers vintage hat sizes are US or UK sizes. Thanks!
2 Replies
Yakkeks
Yakkeks2mo ago
They should be US based on the fact that BB is a us company
hindssm
hindssm2mo ago
But a lot of their vintage pieces were made in the UK, such as some of their vintage shoes. Modern Brooks Brothers, yes, all their items are US sized.