This is a great guide to finding your hat size, where you’ll learn to take your measurement to find the perfect fit, and also convert between US, UK and French sizes.

Our hat size calculator is a great tool for assessing your hat measurement in international, American, and British charts — for both children and adults.

Use our easy hat size calculator to find your perfect fit in seconds. Measure your head, enter the size, and get accurate U.S., U.K., and international results.

To get your size, measure comfortably around your head where your cap will sit, with a tape measure. Take that number in inches, divide by 3.14 (pi) and round up to the nearest eighth. This is your cap …

Use the hat size chart: To find your hat size, take your ruler measurement and find the corresponding size on the chart. Usually, these charts will list the measurements in centimeters and inches. The …

3 days ago · Master the perfect hat fit with this simple size guide. Learn how to measure your head, convert sizes, and avoid common fitting mistakes.

Use a hat size chart: Compare your measurement to a hat size chart to find your corresponding hat size. Many charts provide conversions between different sizing systems.

Just enter your head measurement in inches or centimeters, and it’ll show your hat size across US, UK, and EU charts. You can even download the results to save for next time. If you haven’t measured …

Mar 30, 2025 · Finding the perfect hat size is essential for comfort, style, and fit. This guide explains how to measure your head circumference accurately and convert it into a hat size using simple math …

This guide, along with our handy Hat Size Calculator, will demystify the process and help you find your perfect fit with confidence. What is Hat Sizing and Why Does It Matter?