Not every hat is sized the same way. A felt fedora comes in exact sizes and has to fit precisely; a knit beanie stretches to fit almost anyone; a beret is often sold in a single size. Understanding hat types and sizing tells you how careful you need to be before ordering, and when a single measurement decides everything.
This guide covers ten common styles, how each is sized, and how much the size matters for each. More in our Size Guides section.
The Four Ways Hats Are Sized
| Sizing type | How it works | How precise it needs to be |
|---|---|---|
| Fitted | Sold in exact sizes by head circumference | Very — measure first |
| Adjustable | A strap, drawstring or inner band sets the size | A range, usually wide |
| Stretch | Knit or elastic fabric fits a range of heads | Forgiving |
| One size | A single size meant to fit most heads | Check the stated range |
Ten Hat Types and How They Are Sized
Fedora
A soft felt hat with a pinched crown and a medium brim. Usually fitted, sold in exact sizes. Measure carefully, because a fedora that is too small sits on top of the head and one too large drops over the ears.
Trilby
Similar to a fedora but with a shorter, angled brim. Fitted sizing, same care as a fedora.
Panama
A lightweight woven straw hat, often in a fedora shape. Fitted sizing. Straw does not stretch, so the size must be right from the start.
Wide-Brim Sun Hat
Straw or felt with a broad brim. Often fitted, sometimes with an adjustable inner band. The size matters because a wide brim catches the wind.
Cloche
A close-fitting, bell-shaped hat worn low on the forehead. Fitted sizing, and a snug fit is part of the style.
Beret
A soft, flat, round wool hat. Often sold in one size, with some stretch at the band. Very forgiving.
Beanie
A close-fitting knit hat. Stretch sizing, usually one size. The most forgiving hat there is.
Bucket Hat
A soft fabric hat with a downward-sloping brim. Often sold in S-M-L or one size, sometimes with a drawstring.
Baseball Cap
A soft crown with a stiff peak. Usually adjustable at the back with a strap or snap, fitting a wide range.
Boater
A stiff straw hat with a flat crown and flat brim. Fitted sizing, and rigid, so precise.
How Much the Size Matters, by Style
| Style | Sizing | Precision needed |
|---|---|---|
| Fedora, trilby | Fitted | High |
| Panama, boater | Fitted | High — straw does not stretch |
| Wide-brim sun hat | Fitted or adjustable | Medium to high |
| Cloche | Fitted | High |
| Bucket hat | S-M-L or one size | Medium |
| Baseball cap | Adjustable | Low |
| Beret | One size | Low |
| Beanie | Stretch | Very low |
For any fitted hat, measure first and convert the number into the system the brand uses.
Full instructions are in how to measure hat size; for what a good fit feels like once the hat arrives, read how a hat should fit.
Choosing a Style
The right style depends on your face shape and your wardrobe as much as the size. A fedora works with tailoring and a trench coat; a beanie with casual layers; a panama with summer linen. The best hats for your face shape covers proportion, with the face shape detector if you are unsure of yours.
For travel, a panama or straw sun hat is one of the most useful things to pack for a southern European summer — see what to pack for Italy in summer. For winter, a felt hat is one of the winter accessories worth investing in, and how to store and care for a felt hat keeps it in shape. The personal style quiz helps decide which styles feel like you.
Hat Size Calculator
Head circumference to fitted, S/M/L and EU hat sizes.
Try this free calculator to find your exact match.
Frequently Asked Questions
What are the main types of hat?
Which hats need an exact size?
Do straw hats stretch?
What does one size fits most mean for hats?
Are beanies sized?
For background on the styles, see list of hat styles and the panama hat.
Brand and sizing data on this site is reviewed quarterly. If a figure here is wrong, email fashion@womensfashioneu.com and it will be checked and corrected.
