Choosing
How to Choose Snapback Size: Not Too Tight, Not Too Loose
Choosing the right snapback size starts with measuring your head: wrap a tape measure around the widest part of your head, then compare it with the cap's unadjusted size and how much the rear snap lets it expand.
Why does snapback size matter?
A snapback has a structured crown and a flat brim, so a cap that's too tight leaves a mark on your forehead and gets pushed up toward the top of your head; too loose and it spins around, the brim shifts off-center and the cap loses its shape. A snapback that fits sits snugly around your head, the brim points straight where you're looking, and you can wear it all day without discomfort.
How to measure your head at home
- Grab a soft tape measure (or a piece of string and a ruler).
- Wrap the tape around your head, about 1cm above your eyebrows and just above your ears.
- Keep it snug but don't pull it tight, then read the measurement in cm.
- Measure twice and go with the larger number.
NHS snapback size chart
| Cap | Unadjusted size | Adjustment | Best for head size |
|---|---|---|---|
| Under Jean X3 | 57–58cm | Metal snaps, each notch adds about 2cm | Medium and large heads |
| Under Full Suede | 57–58cm | Metal snaps at the back | A great fit for larger heads |
| Thêu White SW003 | 56–57cm | Snaps at the back | Medium heads |
"Unadjusted size" is the cap's circumference on its smallest notch. If your head is bigger than that, just open up the rear snaps one notch at a time to loosen it.
Tips for choosing a cap if you have a bigger head
- Go for caps with an unadjusted size of 57–58cm and plenty of notches at the back, like the X3 denim snapback.
- Pick a structured crown and flat brim so the overall look stays balanced with your face.
- Send your head measurement to the shop before ordering so NHS can match you with the right cap.
What to check when your cap arrives
- Try it on at the notch that matches your measurement.
- The cap should hug your head without marking your forehead, with the brim pointing straight ahead.
- If it's not quite right, loosen or tighten the snap by one notch.
- If anything's off, contact the shop right away and NHS will help you sort it out.
Frequently asked questions
Can I wear an NHS snapback with a 59cm head?
The X3 and suede caps have an unadjusted size of 57–58cm and loosen further with the rear snaps, so they usually fit. Send your measurement to the shop so NHS can check the exact cap for you.
How do I measure my head without a tape measure?
Wrap a piece of string around your head, mark where the ends meet, then measure the length of the string with a ruler.
Are there smaller sizes for women?
The white embroidered SW003 has an unadjusted size of 56–57cm, which suits many women; message the shop and NHS will suggest more options.
Read next: how to style a snapback · how to care for snapback caps.
