Big Head? Here's What Hat Size You Actually Wear (7¾ and Up)

A no-guessing guide to hat sizing for bigger heads. What 7¾, 7⅞, and 8 actually mean in cm and inches, how head size tracks with height, and where to buy when mainstream brands stop stocking.

Published 2026-03-21 · 7 min read

Marek Cieśla

Founder, Woolet Eyewear · Serial entrepreneur · LinkedIn

Last updated: March 2026

If every "one size fits most" cap slides straight back to the crown of your skull, and every fitted-cap chart tops out one size below yours, this is the guide. No fluff, no chart you have to hunt down — just the numbers, the brands, and the honest answer to "what size hat do I wear?" when your head is on the bigger end of the bell curve.

The short version

If your head measures 60 cm or more, you wear a US 7½ or larger — and mainstream brands stop stocking your size right there. Above 62 cm (7¾), you're in specialist territory: 4–5 brands worldwide will actually fit you off-the-shelf.

The Big-Head Sizing Ladder

Every number below is a real head circumference matched to the size you'll see on the label. No conversions to memorize.

Your head	US size	Letter	Where you can buy
60 cm (23⅝ in)	7½	L / XL	Top of mainstream range — most brands
61 cm (24 in)	7⅝	XL	New Era, some Stetson — specialist for felt
62 cm (24⅜ in)	7¾	XL	Mammoth, Big Hat Store, Bailey, some Stetson
63 cm (24¾ in)	7⅞	XXL	Mammoth, Noggin Boss, Big Hat Store
64 cm (25¼ in)	8	XXL	Specialist only — 3–4 brands worldwide
65 cm+ (25⅝ in+)	8⅛+	XXXL	Custom / made-to-order only

Not sure what your circumference is yet? Measure your head in 60 seconds — a piece of string is enough. Or see the full US/UK/EU hat size chart.

Does Height Predict Hat Size? (Sort Of)

Head circumference correlates with height, but weakly. The rule most tailors use is: for every 10 cm above 180 cm (5'11"), add about 0.5 cm of circumference. It gets you a plausible starting size — never the final answer.

6'0" (183 cm) — median 58 cm (US 7¼). Range: 56–60 cm.
6'3" (191 cm) — median 59 cm (US 7⅜). Range: 57–61 cm.
6'5" (196 cm) — median 60 cm (US 7½). Range: 58–62 cm.
6'7" (201 cm) — median 60–62 cm (US 7½–7¾). Roughly 1 in 3 above 62 cm.
6'9" (206 cm)+ — median 62 cm (US 7¾). Roughly half above 62 cm.

Note the overlap: at every height, roughly 20% of people measure well above the median. Height narrows the guess; only a tape (or a phone camera) confirms it.

Where to Actually Buy (7¾ and Up)

Off-the-shelf, four brands do the bulk of the work above US 7¾. This is the honest map — no affiliate padding.

Mammoth Headwear. The reference brand for XL and XXL fitted caps and bucket hats. Size range up to XXXL (65 cm+). Solid quality, no surcharge on bigger sizes.
Big Hat Store. Broader style range than Mammoth — including western, fedora, and dress hats up to 66 cm. Slightly less consistent shell quality but the widest selection above 63 cm.
Noggin Boss. Novelty/oversized specialists; also stock genuinely wearable caps up to size 8. Better for statement pieces than everyday wear.
Bailey / Stetson (select styles). Not every model is stocked in XL, but the ones that are (Cattleman, Renegade, some Stratoliners) run true to size and are among the best-made hats at any size.

For made-to-order felt hats above 65 cm, look at Optimo (Chicago) and Bencraft (London). Expect a 6–12 week wait and a starting price around $400.

Fitted Caps vs Felt Hats: The 5 mm Gap

A fitted baseball cap in the same labelled size as a felt hat will feel about 3–5 mm tighter — the poly/wool shell has less give than a stretched-and-blocked felt crown. If you land at 61.5 cm on the tape, size up on the cap (7¾) and stay at 7⅝ on the felt.

Straw hats fall in between: more give than a fitted cap, less than felt.

The Hair Question

If you have thick, coarse, or curly hair, measure at the skull — not at the volume. Wet or press the hair down first. A dry curly measurement can add 1–2 cm and put you in a size that fits when your hair is fresh out of the shower but feels loose by the end of the day.

If your hair volume fluctuates significantly (post-haircut vs a month out), measure at both extremes and buy at the smaller reading — a hat that's a hair too tight on haircut day is padded with a sizing strip; a hat that's a full size loose on the same day is falling off.

Measure with your phone

Woolet's AI Fit Wizard uses a single photo and a credit card as a reference to measure your face width to about ±2 mm. Face width and head circumference track together closely, so the Wizard gives you a strong estimate of both without any tape.

Try the AI Fit Wizard →

The Other Thing Big-Head Guys Should Know

If your hat size is 7½ or higher, there's roughly an 80% chance the frames you tried in the last optician's shop pinched your temples. Head circumference and face width aren't the same measurement, but they track together — and the same industry that stops at 60 cm on hats stops at about 145 mm on eyewear.

That's the gap Woolet was built for: frames starting at 158 mm front width in Italian Mazzucchelli acetate, with bespoke sizing up to 172 mm. Same crowd, adjacent problem.

Sized out of eyewear too?

Woolet 007 and 009 ship at 158 mm — designed for exactly the group that shops for hats in XL and XXL.

Glasses for big heads → · Bespoke up to 172 mm →

Quick Answers

What size hat is 7⅝? 61 cm circumference. XL. Above one-size-fits-most caps.

What size hat is 7¾? 62 cm. XL. Requires specialist brand for felt; some mainstream fitted caps stock it.

What size hat is 7⅞? 63 cm. XXL. Specialist only.

What size hat is 8? 64 cm. XXL. Three or four brands worldwide off-the-shelf.

Is 62 cm a big head? Yes — top ~5% of adult males globally. You need XL or an explicit big-head brand.