HOW TO MEASURE YOUR HAT SIZE

    Why hat size matters

    Hats are not just stylish fashion accessories; they also serve a practical purpose by providing protection from the elements and adding a finishing touch of style to your outfit. However, to ensure a hat fits comfortably and is flattering, it's essential to know your hat size. In this article, we'll guide you through the process of accurately measuring your hat size so you can confidently choose the perfect headpiece for any occasion. Your perfect hat deserves the perfect fit.

    How are hat sizes measured?

    Hat sizes are typically measured using the circumference of the head and then compared to a hat size chart for conversion.

    How do I measure for my hat size?

    To measure your hat size, here’s what you'll need:

    • Soft measuring tape
    • Mirror (optional)
    • A friend to help if possible

    1. Stand in front of the mirror and locate the widest part of your head. It is essential to find this spot, as that's where the hat will sit.
    2. Make use of a flexible tape measure. When measuring for a cap or a hat, you want to measure on finger above the brow and one finger above the ear to the largest point on the back of the head. When measuring for a Bakerboy cap, you want to measure just below that point because it sits deeper on your head. Make sure the tape is snug but not too tight. You should aim for a comfortable fit that doesn't press into your skin.
    3. Measure the circumference of your head in centimetres or inches and note down the number. Then, using your measurement, find your corresponding hat size on our hat sizing chart (as seen below) that sets out the hat sizes for men’s hats and women’s hats.
    4. With your hat size in hand, you can confidently select hats that are the perfect fit. Remember that some hats come in small, medium, and large sizes, while others use specific measurements.

    HAT SIZING CHART

    Our hat sizing video takes you through the instructions step by step:

    Additional Considerations:

    • Hat Styles: Different hat styles may fit differently, even with the same measurements. For example, a baseball cap will have a more snug fit than a slouchy beret. Read our tips from our Hatters for individual hat styles.
    • If you're between sizes, generally, opt for the larger size, as you can always add padding or adjust the fit with inserts.
    • Consider the hat material. Some materials are more stretchy than others, so factor this into your decision.

    Conclusion:

    Knowing your hat size will help you find the perfect fit and the perfect hat for a comfortable and stylish look. By following these simple steps to measure your head and converting the measurement into a hat size, you can confidently choose the perfect hat for any occasion. So go ahead and explore our range of luxury hats born out of fashion and functionality.

    View Lock & Co.'s Bestsellers

    SIMILAR ARTICLES

    Have a scroll and discover some of our other articles, from press coverage to style guides and informational pieces.

    View all

    • How Should a Flat Cap Fit?

      The right fit is essential for both comfort and style. A well-fitting flat cap should feel secure without being tight, sit correctly on your head, and complement your face shape.

    • What Is a Flat Cap?

      A flat cap is a rounded, soft-crowned hat with a short, stiff brim at the front. First appearing in Northern England in the 14th century, flat caps became embedded in British and Irish life after a 1571 law encouraged their wear among men of the working classes. By the late 19th and early 20th century, they were worn by everyone from labourers and farmers to gentlemen at leisure. Today, the flat cap retains its heritage charm while being embraced as a versatile style in both town and country.

    • How to Wear & Style a Flat Cap

      A flat cap is one of the most versatile hats you can own. Whether you are dressing for a weekend walk, a day in the city, or a smart country wedding, the flat cap adds effortless polish while remaining comfortable and practical. Here is everything you need to know about wearing one with confidence.

    • How to Care for & Clean a Flat Cap

      Flat caps are designed to last for years, but proper care is key to maintaining their shape, colour, and quality. Different materials -wool, tweed, linen, leather - require slightly different cleaning approaches.

    • How to Fold, Store & Pack a Flat Cap

      Flat caps are travel-friendly by design, but a little care goes a long way in keeping them looking sharp - whether you are storing them at home or packing them for a trip.

    • How to Measure Flat Cap Size

      Getting the right size is the key to a perfect fit. Here’s how to measure your head accurately and choose the right flat cap size.

    • Trending Flat Cap Styles in 2025

      Flat caps remain a staple in 2025, evolving with fresh cuts, new fabrics, and seasonal colour shifts. Here are Lock & Co.’s most notable trends this year, drawn directly from what’s in stock now, with styling tips and product examples to match.

    • What is a Fedora Hat?

      The fedora has long been a symbol of timeless elegance, structured yet soft, refined yet versatile. At Lock & Co., we have shaped the evolution of this iconic silhouette for generations, bringing modern craftsmanship to a classic form.

    • How Should a Fedora Hat Fit?

      At Lock & Co., a well-fitting fedora should feel like a natural extension of your personal style, secure yet comfortable, structured yet wearable. It should sit neatly on the head, complementing your silhouette without ever feeling forced.