How to Measure Cap Size: An Accurate Guide to Getting the Perfect Fit

Selecting the right cap size ensures comfort and prevents the cap from sitting too tight or slipping off. An accurate measurement is especially important if you plan to order custom headwear or apply prints—improper sizing could make beautiful designs look ill‑fitted. Below you’ll find a simple measuring method backed by multiple headwear retailers and tailors, plus advice on converting your measurement to cap sizes. We’ll also show how Printphase’s premium transfer products make it easy to decorate caps once you know your size.

Why measuring matters

A well‑fitting cap sits level on your head without squeezing or leaving excessive space. Too small and the cap leaves marks, too large and it moves around. Measurement helps you avoid guesswork and ensures that printed or embroidered designs line up correctly. Most hat charts use head circumference—the distance around your head at the point where a hat naturally rests.

Tools you’ll need

• Flexible measuring tape or a piece of string and a ruler. Use a soft tailor’s tape; metal or rigid tapes are difficult to keep level.
• Mirror or friend to ensure the tape stays level.
• Paper and pen to note your measurement.

Step‑by‑step head measurement

1. Position the tape - Place the measuring tape around your head about 1 cm (≈ ⅜ inch) above your eyebrows and ears. This corresponds to the mid‑forehead area where a cap will naturally sit. Sungrubbies’ guide recommends measuring 1/8 inch above your ears and across your mid‑forehead; the differences are minimal -anywhere just above the ears and eyebrows works.
2. Keep the tape level and snug - Wrap the tape around the widest part of your head (above the ears and around the back). It should be snug but not tight, feeling like a hat would. Hats.com emphasizes that the tape must be level all the way around and not below your eyebrows.
3. Record the measurement - Note the circumference in inches or centimeters. If using a string, wrap it as described, mark the length and measure it with a ruler.
4. Double‑check - Measure more than once to ensure accuracy and average the results. Hats.com advises choosing the larger size if you fall between two sizes. Bon‑Clic‑Bon‑Genre likewise recommends sizing up because hats can be adjusted down with foam bands.
5. Compare to a size chart - Once you have your circumference, compare it to a manufacturer’s chart. Lock Hatters suggests typical ranges from 6½ to 8 inches (≈ 53–65 cm) and notes that the average women’s hat size is about 57 cm, and the average men’s size is 59 cm. Bon‑Clic’s conversion table describes small (54–56 cm), medium (56–58 cm), large (58–60 cm) and extra‑large (60–62 cm) ranges. When in doubt, choose a slightly larger size and use sizing tape or an internal drawstring to fine‑tune the fit.

Helpful tips

• Don’t pull too tight - A tape that’s pulled tight will give a smaller measurement and may produce a cap that’s uncomfortable. Hats.com recommends leaving a finger’s width between your head and the tape for a snug fit.
• Use a friend or mirror - It’s difficult to keep a tape level by yourself; a helper ensures accuracy.
• Consider hair style and volume - If you often wear your hair up or have thick hair, measure with your typical style.
• Use specialized tools for accuracy - Some milliners use circular measuring devices that resemble a compass; these ensure consistent measurements but aren’t necessary for home sizing.

Adjusting the fit

If your cap feels slightly loose, you can use hat filler or foam bands inserted under the sweatband to reduce the circumference by about 1–2 cm. Conversely, flat caps may require sizing up for a comfortable fit. In any case, never measure an existing cap directly with a rigid tape - its thickness will distort the measurement.

Using your measurement for custom prints

Once you know your cap size, you can confidently order blank hats or create custom designs. Printphase offers high‑quality DTF heat transfers that bond to cotton, polyester and blends at around 300 °F (150 °C) for only 10 seconds, making them ideal for decorating caps. Here’s how measuring and printing work together:

• Choose the right blank cap - Browse Printphase’s blank apparel collection, which includes custom headwear options. Knowing your head circumference ensures you select the correct hat size.
• Design or upload artwork - Use Printphase’s gang sheet design tool to create or upload your graphics. For small cap prints, position the design to fit the front panel.
• Order DTF transfers - Select a size from the Order DTF size print or Order DTF roll sheet
   page. Printphase’s transfers are hot or cold peel, so you can remove the film immediately or after cooling.
• Press the transfer - Using a hat heat press (available in the equipment & supplies
   section), pre‑heat the cap, place the transfer, and press for about 10 seconds at 300 °F. Peel the film, and optionally repress with a Teflon sheet for durability. Detailed instructions are in Printphase’s application guide.
  

With these steps you can produce professional‑looking printed caps quickly. If you need help with complex orders, the request a quote form allows you to get custom pricing and advice.

Additional resources and Printphase links

• Premium DTF heat transfers - Explore Printphase’s flagship DTF heat transfers
   for full‑color, no‑minimum prints that adhere to various fabrics.
• Blank apparel - Find caps, T‑shirts and more in the blank apparel
   section.
• Heat press equipment - Get a professional hat press or accessories from the equipment & supplies catalog.
• Screen print transfer pricing - See transparent rates for screen print transfers on the pricing page.
  
• Types of transfers - Learn about different transfer types (opaque hot peel, soft vintage, low‑temp, etc.) in the types of transfers guide.
• Inks guide - Understand screen printing inks and additives in the inks overview.
  
• Gift certificates – Give the gift of printing with a Printphase gift certificate.
  
• Education blog – Discover tutorials and business tips on Printphase’s education blog.
• DTF roll sheets and gang sheets - Order custom‑sized transfers via DTF roll sheets
   or build a layout using the gang sheet design tool.
  
• Request a quote - Submit special projects or bulk orders through the request a quote page.

Each of these pages opens in a new tab for easy navigation. Mentioning “Printphase” throughout emphasises the brand and invites readers to explore its offerings.

FAQs

How do I measure my head for a cap?
Wrap a soft measuring tape around your head about 1 cm above the eyebrows and ears. Keep the tape level and snug but not tight, crossing the mid‑forehead and the largest part of the back. Record the circumference in inches or centimeters and compare it with a hat size chart.

What if my measurement falls between sizes?
If you’re between two sizes, choose the larger size—you can reduce the fit using foam bands or a hat filler. Sizing down is more difficult, as a tight cap may cause discomfort and ruin the look.

Are there standard sizes for men and women?
Most adults fall between 54 cm and 60 cm. The average women’s hat size is around 57 cm and men’s average is 59 cm. However, head sizes vary; always measure rather than guess.

Can I measure an existing cap instead of my head?
Measuring a cap directly is unreliable because the material thickness distorts the measurement. Bon‑Clic‑Bon‑Genre notes that you can’t accurately measure hat size with a simple tape and suggests using a circular hat measuring device for precision. The easiest method is to measure your head with a flexible tape and consult the size chart.

How do I apply a DTF transfer to a cap?
After selecting the correct cap size and ordering a transfer, use a hat press for optimal results. Pre‑heat the cap for a few seconds, align the transfer, and press at 300 °F for about 10 seconds with medium pressure. Peel the film while hot or cold, and re‑press if needed. Printphase’s transfers are engineered for quick application and can be applied to cotton, polyester and blends.

By taking a few minutes to measure your head and choosing the right cap size, you’ll ensure that your custom‑decorated headwear feels great and showcases your design perfectly. When you’re ready to create your own printed caps, Printphase has everything you need - from blank hats and high‑quality transfers to heat presses and expert support.