Baseball hat sizing can get confusing fast, especially when fitted numbers, letter sizes, and head measurements are all used together. This guide explains how to measure for the right fit and how to use those measurements to find a hat that fits well.
Key Takeaways
- To measure baseball hat size, wrap a flexible measuring tape around the head where the cap will sit, keeping the tape level and snug without pulling it tight.
- A baseball cap size chart matches head circumference in inches or centimeters with fitted sizes, letter sizes, or both.
- Baseball hat sizes vary by brand and hat style, so shoppers should always compare their measurement with the manufacturer’s sizing chart.
- Fitted, stretch-fit, and adjustable baseball caps use different sizing systems, even when they’re designed for the same head measurement.
- If you sell hats online, providing clear instructions on how to measure for a baseball hat size can help shoppers choose the right fit before they buy.
Baseball caps create more sizing questions than most other types of apparel because the tag tells shoppers so little. Someone who knows their clothing size has no idea whether they need a size 7 1/4 or a size 8 baseball hat.
If you’re an ecommerce store owner, explaining to your customers how to measure for a baseball hat size removes that guesswork before anything goes in their cart. That way, your customers can find the right size baseball hat every time.
How Do You Measure Your Baseball Hat Size?
If you sell sportswear online, giving shoppers clear measuring instructions can help them choose the right size before they order. The steps below explain how to measure for a baseball hat size and are written directly for your shopper. If you want, add these instructions to your size chart or sizing guide.
1. Gather a Flexible Measuring Tape
The first step in measuring your baseball hat size is to start with a soft, flexible measuring tape. A flexible tape can wrap around the shape of your head, which makes it easier to get an accurate measurement.
If you don’t have a flexible measuring tape, use a piece of string or ribbon that doesn’t stretch. Wrap it around your head, mark where the ends meet, and then lay it flat against a ruler.
Don’t use elastic string or anything else that stretches because it can change the measurement.
2. Position the Measuring Tape Where the Baseball Hat Will Sit
Next, wrap the measuring tape around the part of your head where you normally wear a baseball hat. For most people, this means placing the tape just above the eyebrows and ears and around the widest part of the back of the head.
Keep the tape level as you wrap it around your head. It should feel snug without squeezing your head.
Don’t pull the tape too tight either. Getting a measurement that’s too small could lead you to choose a baseball cap size that feels tight or uncomfortable.
3. Record Your Head Circumference in Inches and Centimeters
Once the tape is in place, check the number where the ends meet. This is your head circumference, and you’ll use it to find your size on a baseball hat size chart.
Write down the exact measurement instead of rounding it. If possible, record it in both inches and centimeters because brands may list hat sizes differently.
Measure your head one more time to make sure you get the same result. Then compare your measurement with the brand’s size chart to find the best fit.
How Do You Use a Baseball Hat Size Chart?
A baseball hat size chart helps shoppers match their head measurement to the hat sizes you sell. To use one, a shopper finds their head circumference in the chart and then reads across the same row to see the matching hat size.
For merchants, a useful hat size chart may include:
- Head circumference in inches
- Head circumference in centimeters
- Fitted hat size, such as 7 1/8
- Letter size, such as S/M or L/XL
- International sizing information, if you sell in multiple markets
International size charts may use different number systems for the same head circumference. For example, traditional hat sizing charts may list a 57 cm head as EU 57, US 7 1/8, and UK 7. Because individual baseball hat brands can use their own conversions, clearly label the sizing system and use the manufacturer’s chart for the hats you sell.
Baseball Hat Size Chart
The chart below shows what a basic adult hat size chart can look like for baseball caps:
| Head Circumference (in) | Head Circumference (cm) | Fitted Size | Letter Size |
| 21 ½ | 54.6 | 6 ⅞ | S |
| 21 ⅞ | 55.6 | 7 | S/M |
| 22 ¼ – 22 ⅝ | 56.5 – 57.5 | 7 ⅛ – 7 ¼ | M |
| 23 | 58.4 | 7 ⅜ | M/L |
| 23 ⅜ – 23 ¾ | 59.4 – 60.3 | 7 ½ – 7 ⅝ | L |
| 24 ⅛ | 61.3 | 7 ¾ | XL |
Use a chart like this as a general reference rather than copying it directly to your store. Your own baseball cap size chart should match the measurements provided by the manufacturer for the hats you sell because sizing can vary quite a bit between brands.
What Do Baseball Hat Sizes Mean?
Most baseball hats use one of three sizing systems: fitted sizes, stretch-fit sizes, or adjustable sizes. Understanding the difference can help you explain sizing more clearly on your product pages.
Fitted Baseball Hats
A fitted baseball hat comes in a specific size and doesn’t have a strap, snap, or other closure that lets the shopper adjust the fit.
Instead, the shopper needs to measure around their head and compare that measurement with the brand’s fitted size chart. Fitted sizes are usually shown as numbers such as 7, 7 1/8, or 7 1/4.
Stretch-Fit Baseball Hats
Stretch-fit baseball hats have an elastic or flexible band that allows the hat to fit a range of head sizes. Instead of one exact fitted size, they’re often sold in sizes such as S/M, M/L, or L/XL.
If you sell stretch-fit hats, show shoppers the head measurement range for each size. For example, don’t list only “M/L.” Include the inches or centimeters that the M/L size is designed to fit.
Adjustable or One-Size Baseball Hats
Adjustable baseball hats use a closure such as a snap, strap, or buckle to make the hat larger or smaller. That’s why these styles are often sold as “one size” or “one size fits most.”
Even an adjustable hat has a minimum and maximum size. If you sell one-size hats, include the actual head circumference range whenever the manufacturer provides it. That’s especially useful for shoppers whose head measurements fall near the smaller or larger end of the range.
Are Men’s and Women’s Baseball Caps the Same?
Men’s and women’s baseball caps can use the same sizing system, but that doesn’t mean every cap will fit the same way. The actual fit depends on the measurements and construction of the hat.
For example, a fitted size 7 1/4 refers to the same head measurement whether the hat is marketed to men or women. What may change is the style of the cap. Some hats have a shallower crown, a different shape, or features such as a ponytail opening.
If you sell separate men’s and women’s baseball hat collections, don’t rely on the gender label to explain the fit. Show the actual head measurements for each size and include any useful notes about the crown depth, shape, or other design features that may affect how the hat sits.
This gives shoppers the information they need to choose a hat based on fit instead of assuming that a men’s or women’s label determines the size.
How Do You Measure a Child’s Baseball Hat?
To measure a child’s baseball hat size, use the same method you’d use for an adult: measure around the head where the hat will sit and compare that number with the brand’s size chart.
The main difference is that children’s baseball cap sizes may be labeled by age, letter size, or youth size. Since head size can vary between children of the same age, the actual head measurement is more reliable than age alone.
For adjustable hats, include the full size range so parents can see how much room the child has to grow.
Help Shoppers Measure Baseball Hat Size Before They Check Out
If you sell baseball hats online, you need to give shoppers sizing information while they’re deciding what to buy. After you show them how to measure their baseball hat size, they can compare that measurement with your size chart to find the right fit.
Kiwi Sizing helps Shopify merchants build those charts and add them directly to product pages. You can start with a template and show measurements in inches or centimeters. You can also translate sizing information for international shoppers and apply the right chart across multiple products.
When a standard baseball hat size chart isn’t enough, Kiwi Sizing also offers a size recommender that can suggest a size based on shopper inputs.
Set up a Shopify size chart solution like Kiwi Sizing to help shoppers choose the right fit before checkout.
