How to Measure Your Hat Size ?

How to Measure Your Hat Size

Finding a hat that complements your style should feel effortless, but a poor fit can ruin the look and even damage the hat. Unlike clothing, hats aren't elastic or forgiving; size is critical.

In this guide, you'll learn how British hat sizes differ from American and European systems, how to measure your head accurately using photos and a printable chart, and what to consider when choosing your perfect size. For more styles, visit Novella Hats.

Understanding UK, US, and European Hat Sizes

Before you grab a tape measure, it helps to understand the different sizing scales that hat makers use. In the UK and many Commonwealth countries, hats are sized using the imperial system. British sizes represent the diameter of your head in inches and typically range from 6½ to 8.

North American sizes also use the imperial system, but are one‑eighth of an inch larger than the British equivalent. European (metric) sizing measures the circumference of your head in centimetres and usually ranges from 52 cm to 64 cm.

Many modern brands also offer letter sizes (XS, S, M, L, XL) corresponding to centimetre ranges.

Because brands may size slightly differently, a conversion chart is essential. Later in this article, the printable chart converts metric circumferences to UK and US sizes and provides an easy reference when shopping online or in-store.

Tools You’ll Need

Measuring your head is simple and inexpensive; you probably have everything you need at home. A flexible measuring tape is ideal, but a piece of string and a ruler work just as well. Ask a friend or family member to help; keeping the tape level when someone else holds it is easier.

Avoid metal or stiff tapes as they won't conform to your head's shape. A mirror also helps you see if the tape is sitting evenly.

Step‑by‑Step Measuring Guide

1. Position the tape correctly.
   Place the tape just above your eyebrows and about 1 cm above your ears, where most hats sit. If using a string, follow the same path.

2. Wrap evenly.
   Circle your head with the tape, ensuring it stays level and doesn't dip low or ride high at the back. Check out our Flat Caps collection—a classic style that needs accurate sizing for a snug fit.

3. Check snugness.
   The tape should be snug enough to stay put but not tight enough to leave marks. A slightly stricter fit will sit higher and stay on better in windy conditions, while a looser fit is more comfortable for extended wear.

4. Take the measurement.
   Read the circumference in centimetres. If using a string, mark the meeting point with a pen, lay the string flat, and measure with a ruler.

5. Repeat for accuracy.
   Take at least two measurements to ensure consistency. Hair styles, head shapes, and even the time of day can influence measurements. If your measurements differ, choose the larger number.

6. Round and convert.
   Hat sizes are rounded to the nearest whole centimetre. If you fall between sizes, round up to the larger size for comfort. Use the printable chart to convert your centimetre measurement to UK, US, and letter sizes.

Easy Way to Measure an Existing Hat

If you already own a hat that fits well, measuring its inside circumference can provide another reference. Place the tape measure inside the sweatband (the strip that touches your head) and follow the same path around the hat's interior. Compare this measurement with your head circumference and the chart below.

String Method for Measuring Head Size

Some people prefer using a string because it's easier to manipulate around hair or accessories. Wrap the string or ribbon around your head from the back to the front and mark where the ends meet. Lay the string flat and measure with a ruler. This method is also helpful if you're discreetly measuring someone else's head; just be sure the string isn't pulled too tight or left too loose.

Printable Hat‑Size Chart (UK/US/Metric)

Use the chart below to convert your head circumference to UK and US hat sizes. The data is based on industry standards. Remember that individual brands may vary slightly, so always check a brand's specific size guide when available.

How to use: Find your head circumference (first column) or inch measurement, then read across to find the equivalent UK size (imperial), US size, and general letter size. For example, a head measuring 58 cm corresponds to UK size 7⅛ and US size 7¼ and falls under the M/L category.

Hat Fit Tips and Key Considerations

Size isn't the only factor that affects how a hat fits. Keep these points in mind when selecting your hat:

• Manufacturing variations: Not all brands size their hats the same. Labels may vary by manufacturer, so always check individual size charts.

• Materials and construction: Natural materials like wool or straw can stretch or shrink over time. A hat that fits snugly out of the box may loosen with wear. Conversely, leather sweatbands may conform and get tighter with moisture. Consider a slightly looser fit if you expect the hat to shrink.

• Head shape and style: Hats are not one‑size‑fits‑all. Your head shape (round, oval, long) and the hat's design influence the fit. Try different styles, such as fedora, trilby, bowler, and Panama to see which suits you best.

• Comfort is key: If you're between sizes, choose comfort. You can always add a sizing strip or liner inside the sweatband for a tighter fit, but making a too-small hat is hard. Use a measuring tape and a few minutes to ensure your hat feels comfortable on long days.

Discover More at Novella Hats

Once you know your size, explore a variety of styles at Novella Hats, a UK‑based retailer offering classic and contemporary headwear. Explore the Men's Hat collection for bowler hats, trilbies, and flat caps, or discover straw options in the Panama hats range and the sophisticated bowler hats collection.

Final Thoughts

Measuring your head takes only a few minutes but saves you the frustration of buying a hat that sits awkwardly or falls off.

By correctly understanding how to confidently select the correct size by British, American, and European sizing systems, using a flexible tape measure, and consulting a conversion chart, you can determine if you're between sizes, consider materials and head shape, and prioritise comfort.

With these tips and Novella Hats’ wide selection, your next hat will look sharp and feel great.