A Definitive Guide on How to get the width of your head?

October 2, 2025 •

2 min read

According to one study, the average adult head circumference varies by gender, with an average of 57cm for males and 55cm for females. However, the width, a straight-line measurement across the widest part of the head, is a distinct metric crucial for fitting protective gear and custom headwear. Here’s how to get the width of your head with precision using basic tools.

Quick Summary

Obtaining your head's width involves measuring the maximum side-to-side distance, typically found slightly above and behind the ears, at the widest point. While specialized anthropometric calipers provide the most accurate reading, a flexible tape measure can be used at home to find a close approximation for most practical applications, like sizing helmets or hats.

Key Points

Tape Measure vs. Caliper: Use a flexible, non-stretch tape for DIY estimation, or anthropometric calipers for maximum professional accuracy.
Locate Widest Point: The measurement for head width is a straight-line distance across the broadest part of the head, typically found just above and behind the ears.
Not Circumference: Head width is a distinct measurement from circumference, which measures the perimeter, and is used for different fitting purposes, especially for items with specific side-to-side fit.
Measure Multiple Times: Always measure your head's width at least three times and take the largest consistent reading to ensure reliability and account for any human error.
Purpose Varies: The best method and tool depend on your purpose—hats and wigs often rely on circumference, while helmets and specialized gear may require precise width measurements.
DIY Caliper Substitute: For a more accurate home measurement, use a standard ruler to measure the distance between two books or flat objects held against the sides of your head.

Understanding Head Width vs. Circumference

It is important to differentiate between head width and circumference. Circumference measures the perimeter and is used for hat sizing, while width is a straight-line distance across the head, vital for snug-fitting items like helmets.

Tools You'll Need

Accurate measurement requires the right tools. While professional anthropometric calipers offer the most precision, you can use common household items:

Flexible Measuring Tape: A tailor’s tape works best as it conforms to the head's shape.
Mirror: Helpful for accurate positioning.
A Helper (Optional): Can make the process easier.
Alternative: Two Flat Objects and a Ruler: For a straight-line measurement similar to calipers, use two books and a standard ruler to measure the distance between them.

Step-by-Step Guide to Measuring Head Width

Follow these steps for an accurate home measurement:

Preparation: Flatten your hair to avoid inaccurate readings.
Locate the Widest Points: Find the points on the sides of your head furthest apart, usually above and behind the ears.
Position the Measuring Tape: Wrap the tape flat and straight across these widest points. It should be snug, not tight.
Confirm Alignment: Use a mirror to ensure the tape is level.
Record the Measurement: Note the reading where the tape overlaps.
Repeat for Consistency: Measure three times and take the largest consistent measurement for reliability.

Professional Measurement with Calipers

Professionals use spreading or anthropometric calipers for the most accurate head width measurements. These tools directly measure the distance between the widest points without wrapping around the head.

Why Measuring Head Width is Important

Knowing your head width is crucial for several reasons:

Protective Headgear: Ensures a safe, secure fit for helmets.
Custom Wigs and Headwear: Required for custom-made items.
Medical and Anthropological Use: Important in infant development tracking and historical anthropology studies.

DIY vs. Professional Measurement: A Comparison


Criteria	DIY Method (Tape Measure)	Professional Method (Calipers)
Accuracy	Good for general purposes; potential for human error.	Excellent; precise and repeatable.
Tools	Flexible tape, mirror, optional helper, or ruler and flat objects.	Anthropometric calipers.
Cost	Low.	High (for tools and expertise).
Application	Hat/wig sizing, personal reference.	Medical, forensic, custom design.
Convenience	Easy at home.	Requires a professional and specialized tools.

Related Head Measurements

Other relevant head measurements include:

Head Circumference: Around the largest part, for general hat sizing.
Front-to-Nape Length: From forehead to nape over the crown.
Cephalic Index: Ratio of width to length ($$CI = (Width / Length) imes 100$$) to categorize head shape.

Conclusion

Learning how to get the width of your head is useful for proper fitting of headwear and gear. While a flexible tape measure provides a good estimate at home, professional calipers offer the highest precision. Understanding your head's dimensions contributes to comfort and safety.

For more information on the importance of head circumference tracking in children, consult authoritative health sources like the National Institutes of Health (NIH).

Frequently Asked Questions

While average head circumference is often cited (around 57cm for males and 55cm for females), average head width is not as commonly published and varies significantly between individuals. Personal measurement is essential for proper fitting of headwear and gear.

You can use a metal ruler in combination with two flat objects, like books, to get an accurate straight-line measurement of your head's width, similar to calipers. Do not wrap a rigid ruler around your head, as it will be inaccurate.

For protective gear like helmets, both measurements are important, but width is critical for a snug side-to-side fit to prevent shifting and provide maximum protection. Circumference determines overall size, but width ensures proper lateral fit.

To measure head length, use a flexible tape measure from the most prominent part of your forehead to the most prominent part of the back of your head. A helper can make this easier.

The cephalic index is a ratio of head width to head length, calculated as $$CI = (Width / Length) imes 100$$. It is used to categorize head shape.

Yes, voluminous hair can skew your measurements. Flattening your hair before measuring provides a more accurate reading, especially for close-fitting items.

When between sizes, it is generally recommended to choose the larger size for comfort. For critical fit items like helmets, consult the manufacturer's guide or try them on.