Guide

Snug all around, level on your head, a finger's width above the ears — and measured in inches before anything else. A New York hatter's guide to fedora fit, US hat sizes, and head sizes 7 3/4 and up.

A hatter's checklist for judging a trapper hat: the shell that matches your weather, a lining dense enough to hold heat, a brim with a spine, earflaps that seal, and a fit taken with the flaps down.