How to Measure Hat Size at Home

Two easy methods to find your hat size using items you already have at home. No special tools required.

1

Tape Measure Method

What you need: A flexible tape measure (like a sewing tape measure).

  1. Step 1Place the tape measure around your head about 1 cm (half an inch) above your ears and across the middle of your forehead, where a hat would naturally sit.
  2. Step 2Keep the tape snug but not tight. You should be able to fit one finger between the tape and your head.
  3. Step 3Note where the tape overlaps. Read the measurement in centimeters or inches.
  4. Step 4Find your measurement in our hat size chart to determine your size.

Tip: This is the most accurate home method. Repeat 2-3 times and use the average measurement.

2

String Method

What you need: A piece of string, ribbon, or strip of paper, plus a ruler with centimeter or inch markings.

  1. Step 1Wrap the string around your head about 1 cm above your ears and across the middle of your forehead.
  2. Step 2Mark the point where the string overlaps with a pen or pinch it between your fingers.
  3. Step 3Lay the string flat against a ruler and measure the length in centimeters or inches. This is your head circumference.
  4. Step 4Match your circumference to the hat size chart or use the converter.

Tip: Use a non-stretchy material like ribbon or paper for the most consistent results.

Tips for Accurate Measurement

  • •Measure at the right position. The tape should sit where the hat band would rest: about 1 cm above the ears and across the mid-forehead, not at the widest point of the skull.
  • •Account for your hair. If you have thick hair, measure with your hair styled as you would normally wear it under a hat. Very thick hair can add a full size.
  • •Consider the hat style. Fitted caps need an exact size, while snapbacks and adjustable hats are more forgiving. Beanies stretch to fit a range of sizes.
  • •Measure multiple times. Take 2-3 readings and use the average for the most reliable result.
  • •When in doubt, size up. A hat that's slightly loose can be adjusted with sizing tape or foam inserts. A too-tight hat is uncomfortable and cannot be easily fixed.

Frequently Asked Questions

What is the most accurate way to measure hat size at home?

The most accurate method is using a flexible tape measure wrapped around your head about 1 cm above your ears and across the middle of your forehead. This gives your head circumference, which you can match to a hat size chart.

Should I measure my head with or without hair?

Measure with your hair styled as you would normally wear it under a hat. Thick or voluminous hair can add up to a full size, so it is important to account for it.

What if my hat size is between two sizes?

Always round up to the larger size. A slightly loose hat can be adjusted with hat sizing tape or foam inserts. A too-tight hat is uncomfortable and can cause headaches.

Do hat sizes vary between brands?

Yes, hat sizes can vary slightly between manufacturers. Always check the specific brand's size chart when possible. Our conversion chart provides standard measurements that work as a reliable starting point.

What is the average hat size?

The average adult hat size is approximately US 7 1/8 to 7 1/4 (UK 7 to 7 1/8, EU 57-58), which corresponds to a head circumference of about 57-58 cm (22.4-22.8 inches).