How to Measure Your Head for a Wig: 3 Measurements for a Better Fit

To measure your head for a wig, use a soft measuring tape to record your head circumference, front hairline-to-nape distance, and ear-to-ear distance over the top of your head. Keep the tape close to your head without pulling it tight. Then compare your results with the sizing instructions for the specific wig you want to buy.

Before you measure: keep the setup consistent

Have a flexible fabric measuring tape, a mirror, and somewhere to write your results. A friend can help check the back of your head, where the tape is harder to see. A rigid ruler won't follow the curve of your head.

• Arrange your hair flat in the way you plan to wear it under the wig. Avoid measuring over a high bun or bulky ponytail.
• Follow the seller's instructions about measuring with or without a wig liner. Note what you wore so you can repeat the same setup.
• Check that you're reading the correct side of the tape. Inches and centimeters are not interchangeable.
• Keep the tape flat, without twists. It should touch your head but should not press into your skin.

If your front hairline is difficult to identify, use a reference photo or ask a wig fitter to help locate the starting point. Starting lower on the forehead changes the measurement. Don't use the eyebrows as a substitute for the hairline.

How to measure your head for a wig: three steps

These measurements follow different paths. Circumference goes around your head; front to nape and ear to ear go over it. The National Breast Cancer Foundation's wig-fitting guide describes all three. Its advice is written for people facing treatment-related hair loss, but the measuring paths are useful for full-wig shoppers generally.

1. Measure your head circumference

1. Place the tape's zero end at the center of your front hairline.
2. Guide it toward one ear, just above where the ear joins your head.
3. Continue around the back at your nape hairline, then past the other ear.
4. Bring it back to the starting point and record the full loop.

Check the back in a mirror: the tape should follow the intended hairline path rather than ride up over the back of your head. Don't add extra room to the number. The seller needs your actual measurement to compare with its cap specifications.

2. Measure from your front hairline to your nape

1. Start at the center of your front hairline.
2. Follow the center of your head over the top and down the back.
3. Stop at the nape hairline, where the scalp meets the neck, and record the distance.

The tape should rest along the curve, not form a straight line through the air. Ask someone to check the endpoint if you can't see it. This measurement is sometimes labeled "front to back" or "front to nape."

3. Measure ear to ear over the top of your head

1. Start where the top of one ear joins your head.
2. Pass the tape over the top of your head to the matching point above the other ear.
3. Record the distance without stretching the tape.

Use the seller's diagram to confirm the exact over-head path. Some charts also ask for an ear-to-ear measurement across the forehead. That is a different measurement, so check the label before entering your result.

Take each measurement again with the same hair setup and landmarks. If the numbers differ, check the tape's position and tension before measuring a third time. Don't average readings taken along different paths.

Write down your measurements before choosing a size

Use this table as a worksheet. The blank spaces are for your measurements, not recommended cap sizes.

One inch equals 2.54 centimeters. For example, a 22-inch measurement converts to 55.88 centimeters. That conversion doesn't assign you a cap size; the product's chart determines how the measurement is used.

Also note your hair arrangement and whether you wore a liner. If you change that setup or the amount of hair underneath changes, remeasure before relying on an older record.

How to use your measurements to choose a wig cap size

Compare your numbers with the chart for the exact brand and style. The American Cancer Society's wig-sizing guidance advises checking the brand's chart because sizing can vary. A size label alone is less useful than the measurements behind it.

You may see petite, average, large, or combined labels such as petite/average. Don't assume a size you wear in one brand will fit the same way in another. If a product lists only circumference, use that chart and ask the seller whether your other measurements affect the fit.

If you're between sizes or your measurements don't agree

Send the seller all three measurements and the style you're considering. Follow its instructions for that cap rather than automatically choosing a larger size. Ask whether the recommended fit depends on stretch or adjustment, and what range has actually been confirmed.

A message can be as simple as: "My circumference is ___, front to nape is ___, and ear to ear over the head is ___. I measured with my hair flat and [with/without] a liner. Which size of this style would you recommend?"

If the listing says adjustable or one size

Ask for the supported head-circumference range. Adjustment features can help fine-tune a fit, but "adjustable" doesn't tell you how much room is available. A fixed clip fastens the piece; it isn't the same as a strap that changes the cap's fit.

Check the return and exchange conditions before ordering or altering the wig. Don't cut lace, remove required tags, or make permanent changes until you understand the seller's conditions and have checked the fit as permitted.

Keep cap size separate from hair length and material

When browsing our synthetic wigs, treat the inch measurement in a hairstyle title as hair length. A short pixie doesn't necessarily have a smaller cap than a bob.

Synthetic describes the hair fibers. Lace describes the cap material. Neither is a head-size measurement. Likewise, a lace or monofilament panel listed as length by width cannot be converted into an appropriate head circumference without knowing exactly what was measured.

If you're still deciding on hair material, our synthetic vs. human hair wig comparison covers that separate choice. Confirm sizing for the individual product before buying.

How should a wig fit when you try it on?

A wig should feel secure without uncomfortable pressure. Follow the fitting directions supplied with it and use the same hair arrangement you used when measuring.

• Check that the front sits at the intended hairline rather than being pulled down to compensate for fit.
• If the cap has ear tabs, check that they are balanced on both sides and aren't covering your ears.
• Check the nape and sides for obvious gaps, bunching, or pressure.
• Gently turn your head and look down. Notice whether the cap shifts enough to need repeated repositioning.
• If adjustment straps are present, use them according to the product instructions. Don't keep tightening an uncomfortable cap.

Movement or pressure can have more than one cause, including placement and the hair underneath. Recheck the setup first. If the fit still feels wrong, contact the seller with your measurements and a description of the problem before changing the wig.

Once the fit is settled, our guide to making a synthetic wig look natural covers appearance adjustments. Styling shouldn't be used to hide an unresolved fit problem.

Frequently asked questions about measuring for a wig

How do I know my wig cap size?

Your cap size is the range that contains your head circumference on the exact wig's size chart, provided its other required measurements also fit. Do not treat “average” or “adjustable” as a universal size. If a listing gives no fit range, its size is unverified; choose a style with a published chart or obtain that style's range before ordering.

Do I need to measure for a synthetic lace wig?

Yes. Hair fibers and cap material don't determine fit. Measure for a synthetic lace wig as you would for another full wig, then follow that product's sizing instructions.

Can I measure my head without a soft tape measure?

A nonstretch ribbon or piece of string can follow the measuring path. Mark where it ends, then lay it straight against a ruler without stretching it. A fabric tape is easier to read while it's in position. Recheck before making a purchase if the substitute slips or stretches.

Should I measure with a wig cap on?

Follow the seller's measuring instructions. If you measure with a liner, tell the seller and record that setup. Avoid comparing a measurement over a bulky liner with a chart that asks for a measurement close to the scalp.

Is ear to ear measured across the forehead or over the head?

This guide uses the over-head measurement. Some charts request both. Read the full label and follow the matching diagram, since the two paths produce different results.

Do hair toppers and clip-in extensions use the same measurements?

No. These steps are for a full wig. For a hair topper, base coverage and attachment placement are separate considerations. Clip-in extensions also don't use a full-wig cap size. Follow the instructions for the type of piece you're buying.

Keep your measurement record with the product's sizing instructions. If the listing leaves the fit range unclear, send your numbers to the seller before ordering.