Guides
Hat sizing guides
Deep dives that pair with the tools: every guide links back to a chart, a converter or a measuring page — and every tool page lists the guides that fit it.
New Era cap sizing guide: 59FIFTY vs 39THIRTY vs 9FORTY
How 59FIFTY, 39THIRTY and 9FORTY sizes relate, how to measure for a New Era fitted, and how to translate your head size into any cap the brand sells. Unofficial guide.
Read the guide →
Cowboy hat fit guide: crown, brim and the long-oval head
Why cowboy hats are sold in fitted fractions with oval shapes, how brim width changes comfort, and how to measure correctly for western headwear.
Read the guide →
Crochet hat sizing: why the chart includes negative ease
Crocheted hats stretch and relax. Learn the crown-diameter formula, why patterns call for negative ease, and how to size exactly for any head — adult or child.
Read the guide →
Youth hat sizing vs men's hat sizing: where the tables meet
Youth and men's hat size charts use the same mathematics — only the head ranges differ. A data-backed look at WHO growth medians, fitted fractions and when a child outgrows the youth ranges.
Read the guide →
Start with the hat size chart or themeasuring guide.