Measuring Your Head for a Wig, and What to Do When the Size Is Not Listed
Three measurements, a tape, five minutes. Plus what to do about the fact that most listings only ever say "average size" — including most of ours.
A wig that does not fit is the most common reason a unit gets worn twice and then lives in a drawer. Too loose and it creeps backwards through the day; too tight and you get a headache by mid-afternoon and tension on your own hairline you do not want.
Worth saying up front: most listings — including most of ours — say nothing more specific than "average size", if they say anything at all. Only about one wig in seven in our catalogue publishes a cap measurement. So the useful skill is knowing your own numbers and whether "average" includes you.
The three measurements
1. Circumference
The one that matters most. Run the tape around your head along the front hairline, above your ears, and around the nape bone at the back. Snug, not tight. This is the number wig sizing is built on.
2. Front hairline to nape
From the centre of your front hairline, over the top of your head, down to where your hairline ends at the back of your neck. Tells you whether the cap will sit where it should front to back.
3. Ear to ear
From the top of one ear, across the crown, to the top of the other. Matters most for frontals — it is roughly the span the lace has to cover.
What the sizes mean
| Small / Petite | Around 21" · 53–54cm |
|---|---|
| Average / Medium | Around 22–22.5" · 55–58cm — what almost every listing means by "average size" |
| Large | Around 23"+ · 59cm and above |
Most manufactured wigs are built to average and rely on adjustable straps to cover roughly an inch either side of it. If you measure 22–23 inches, nearly everything will fit. Below 21 or above 23.5 and the straps stop being enough.
If the listing does not say
What to do — in order
- Check the retailer's own page. The affiliate feed strips a lot; the product page on their site often carries a size chart the feed never included.
- Assume average. If nothing is stated anywhere, it is almost certainly built to 22–22.5". Unstated size is not a warning sign — it is a gap in what gets published.
- Look for adjustable straps. Where a listing mentions them, you have about an inch of tolerance in each direction.
- Ask before you buy if you are outside the range. If you measure under 21" or over 23.5", message the retailer. It is a reasonable question and the answer decides the purchase.
Do not fix a loose wig with tighter braids. Pulling your own hair harder to make a cap grip is how traction damage starts at the hairline. Tighten the straps, add a grip band, or size down — not your own hair.
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