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8 min read

How to Measure a Hat?

Measuring a hat can be quite tricky if you don’t know what you’re doing. There are so many angles that it can be confusing to even know what to measure or where to place...
Written by
Nella Cheng
Published on
November 22, 2023

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Measuring a hat can be quite tricky if you don’t know what you’re doing. There are so many angles that it can be confusing to even know what to measure or where to place your measuring tape! With most items of clothing, it’s important to lie the items flat to ensure that you capture measurements correctly. However, with a hat, that clearly isn’t possible. Instead, you have to know how to work with the angles of the hat to get accurate measurements. Here is a simple guide:

Sizely Hat Template


  1. Hat height: Place the measuring tape at an edge of the brim and pull the tape up to the top of the hat.
  2. Circumference: Measure the circumference of the hat by placing the measuring tape on the inside edge of the hat’s head hole and pulling the measuring tape in a circle until both ends of the measuring tape meet.
  3. Hat brim width: Measure the hat brim width by placing the measuring tape at the edge of the brim and pull it inward towards the base of the hat.

Measuring tips:

  • Measure your hat on a flat, solid surface
  • Be sure to measure the circumference correctly: you must measure the  circumference of the head hole, not the outer brim.

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