How to Measure Cap Size

A Quick Guide for Your Next Batch of Promotional Caps

Whether you’re getting ready for a company giveaway, planning a team uniform, or launching your own branded merch line, custom promotional caps are always a solid choice. They’re stylish, versatile, and—most importantly—practical. But before you dive headfirst into designing your own batch, let’s tackle one essential step: How do you measure cap size properly?

Here’s a quick and easy guide to help you get it right, so your caps fit just as well as they look.

Why Getting the Right Cap Size Matters

Promotional caps aren’t just accessories. When branded well and worn comfortably, they become walking billboards for your business or cause. But a cap that’s too tight or too loose? That’s a branding opportunity missed. A proper fit not only looks more professional but makes the wearer more likely to use it again—and that means more visibility for your brand.

What You’ll Need

• A soft measuring tape (preferably tailor's tape)

• A mirror (to make sure the tape stays level)

• A notepad or phone to record the measurements

If you don’t have a soft measuring tape, you can use a string and a ruler instead.

Step-by-Step Guide to Measuring Cap Size

1. Wrap the Tape Around Your Head
   Place the tape where the base of the cap would sit—typically about an inch above your eyebrows and ears. Make sure the tape is snug but not tight. You’re looking for comfort here, not pressure.

2. Keep It Level
   Check in the mirror to ensure the tape is level all around your head. It should follow the natural curve of your skull and sit evenly.

3. Record the Measurement
   Take note of the measurement in centimeters or inches. If you’re using a string, mark where it overlaps and lay it flat against a ruler.

4. Compare With Standard Sizing
   Most caps are labeled using general sizes like S, M, L, and XL or as “One Size Fits All” with adjustable straps. Here’s a quick cheat sheet:

   Size	Inches	Centimeters
   S	21 ¼ – 21 ⅝	54 – 55 cm
   M	22 – 22 ⅜	56 – 57 cm
   L	22 ¾ – 23 ⅛	58 – 59 cm
   XL	23 ½ – 23 ⅞	60 – 61 cm

Pro Tip: Go Adjustable for Giveaways

If you're creating promotional caps for a large group, such as event attendees, employees, or customers, adjustable options like snapbacks, velcro closures, or buckle straps are your best bet. This way, you won’t have to worry about getting everyone’s measurements and the cap becomes a one-size-fits-most solution—without compromising on style.

Customize Your Cap with CraftClothing

Once you’ve sorted out sizing, the fun begins: design. Whether you’re going for a sleek corporate look, something sporty, or even playful streetwear styles, CraftClothing has all the tools and materials to bring your custom cap ideas to life.

Choose from:

• Baseball caps

• Trucker caps

• Bucket hats

• Flat-bill and visor styles

• Embroidery or silkscreen options

Each one is made with the craftsmanship and durability that CraftClothing is known for, so you know they’ll last—and leave an impression.

Final Thoughts

Measuring cap size might seem like a small detail, but it makes a big difference. After all, a promotional cap isn’t just a piece of fabric—it’s a statement. Make sure it fits well, feels good, and carries your brand with pride.

Ready to create promotional caps that everyone will actually want to wear?
Check out the full collection and customization options here:
👉 CraftClothing Caps Collection

Let’s craft something timeless.