Hat Size Calculator

Fashion Calculators

This easy tool will help you calculate the right hat size for you!

Hat Size Calculator

My hat is meant for

Head circumference

🌎 International hat size

🇺🇸 US Size

🇬🇧 UK Size

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◦How do you measure your head for a hat?

◦Charts of hat sizes in centimeters and inches

How do you measure your head for a hat?

Head circumference is used to determine the size of hats. Measure it accurately by finding the area that protrudes most from the back of the head, and connecting it to the highest part of the forehead with a line approximately 0.4-8 in (1-2.5 cm) above your ears.

Charts of hat sizes in centimeters and inches

Although international size charts are generally quite straightforward, hat sizes can still be confusing, especially when it comes to American and British measurements. Both the UK and US sizes for hats use inches according to different standards.

You can find the answers to these questions and many others by using the charts below:

How big is a hat?

What size hat is 24 in?

What size is large in inches for a hat?

Chart of adult hat sizes

Head circumference| International size| US size| UK size

20.5 in/ 52 cm| XS| 6 1/2| 6 3/8

20.9 in/ 53 cm| XS| 6 5/8| 6 1/2

21.3 in/ 54 cm| S| 6 3/4| 6 5/8

21.7 in/ 55 cm| S| 6 7/8| 6 3/4

22 in/ 56 cm| M| 7| 6 7/8

22.4 in/ 57 cm| M| 7 1/8| 7

22.8 in/ 58 cm| L| 7 1/4| 7 1/8

23.2 in/ 59 cm| L| 7 3/8| 7 1/4

23.6 in/ 60 cm| XL| 7 1/2| 7 3/8

24 in/ 61 cm| XL| 7 5/8| 7 1/2

24.4 in/ 62 cm| XXL| 7 3/4| 7 5/8

24.8 in/ 63 cm| XXL| 8| 7 3/4

25.2 in/ 64 cm| XXXL| 8 1/8| 7 7/8

Children's hat size chart

Head circumference| Age| US size| UK size

15.7 in/ 40 cm| 0-6 months| 5| 4 7/8

16.5 in/ 42 cm| 0-6 months| 5 1/4| 5 1/8

17.3 in/ 44 cm| 6-12 months| 5 1/2| 5 3/8

18.1 in/ 46 cm| 6-12 months| 5 3/4| 5 5/8

18.9 in/ 48 cm| 12-24 months| 6| 5 7/8

19.7 in/ 50 cm| 24-48 months| 6 1/4| 6 1/8

20.5 in/ 52 cm| 4-8 years| 6 1/2| 6 3/8

21.3 in/ 54 cm| 4-8 years| 6 3/4| 6 5/8

Article author

Parmis Kazemi

Parmis is a content creator who has a passion for writing and creating new things. She is also highly interested in tech and enjoys learning new things.