Syncrize Football tools that answer the sizing questions fast
Helmet Size Finder

What size football helmet do you need?

Measure your head circumference, drag the slider, and get the right youth or adult helmet size — then air-fit it for a helmet that grips without rocking.

Youth & adult sizes By head circumference

How to measure

Wrap a soft tape around the largest part of the head, about one inch above the eyebrows and ears. Keep it level and snug.

Enter head circumference

Measured in inches, one inch above the eyebrows.

Recommended helmet size
Youth Large / Adult Small

A 21.50" head circumference maps to a Youth Large / Adult Small football helmet.

21.5"Circumference
54.6 cmMetric

Fit note

A crossover band — try both if you are between youth and adult shells.

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Football helmet size chart

Head circumferenceHelmet size
Under 20.5"Youth Small
20.5" – 21.25"Youth Medium
21.25" – 22"Youth Large / Adult Small
22" – 22.75"Adult Small
22.75" – 23.5"Adult Medium
23.5" – 24.25"Adult Large
Over 24.25"Adult XL

New to fitting a helmet? Read how to fit a football helmet.

How do you measure for a football helmet?

Wrap a soft tape measure around the largest part of the head, about one inch above the eyebrows and ears. Keep the tape level. That circumference maps to a helmet size, which you then fine-tune with the air bladders.

How should a football helmet fit?

The helmet should sit one to two finger-widths above the eyebrows, grip the crown with no gaps, and press the cheeks. It should not rock front-to-back or side-to-side once the air-fit pads are inflated.

What size football helmet for a youth player?

Most youth players fall in a Youth Medium (about 20.5" to 21.25" circumference). Always measure — youth head sizes vary widely at the same age.

Can you adjust a football helmet that is slightly loose?

Yes. Air-fit helmets have bladders you inflate with a pump to remove small gaps. If the helmet still lifts or rocks after inflating, it is the wrong shell size.

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