Headband Sizes: Baby, Kids and Adult Measurements
For parents buying baby and toddler headbands, and for anyone sewing or buying stretch, sports or hard headbands. It covers sizes by age, standard widths and how much smaller than the head a stretch band should be.
Stretch headbands are sized by head circumference: about 14 in (35 cm) for a newborn, 18 in (46 cm) at 12 months, 19–20 in (48–51 cm) for young children and 21–23 in (53–58 cm) for adults. The finished band is usually 1–2 in (2.5–5 cm) smaller than the head so it grips without pressing.
- Newborn head
- 13.3–13.6 in (34 cm)
- 12 months
- 17.7–18.1 in (45 cm)
- Adult head
- 21–23 in (53–58 cm)
- Stretch band
- 1–2 in under head
On this page
Headband size chart by age
Head growth is fast in the first year and slow after age 2, so a headband that fits a 3-month-old will be outgrown within weeks, while one that fits a 5-year-old may still fit at 8. The head measurements for ages up to 2 are the World Health Organization median values for girls and boys. Finished band sizes apply to stretch bands that close in a loop.
| Age | Head (in) | Head (cm) | Finished stretch band |
|---|---|---|---|
| Newborn | 13.3–13.6 | 33.9–34.5 | 12–13 in (30–33 cm) |
| 3 months | 15.6–15.9 | 39.5–40.5 | 14–15 in (36–38 cm) |
| 6 months | 16.6–17.0 | 42.2–43.3 | 15–16 in (38–41 cm) |
| 12 months | 17.7–18.1 | 44.9–46.1 | 16–17 in (41–43 cm) |
| 2 years | 18.6–19.0 | 47.2–48.3 | 17–18 in (43–46 cm) |
| 3–8 years | 19–21 | 48–53 | 17.5–19.5 in (44–50 cm) |
| Teen and adult women | 21–22.5 | 53–57 | 19.5–21 in (50–53 cm) |
| Adult men | 22–23.5 | 56–60 | 20–22 in (51–56 cm) |
The medians hide a range of a few centimeters either side, so measure when you can. Wrap a soft tape around the head where the band will sit: for babies, across the forehead just above the eyebrows and over the tops of the ears; for adults wearing a band behind the hairline, slightly higher and behind the ears. The same circumference drives hat sizing, and the hat size chart converts it to US, UK and EU hat sizes.
Take headbands and bows off before naps and bedtime. A band that slips over a baby's face or down to the neck is a suffocation and strangulation risk, and small bows and gems are choking hazards. Keep the band loose enough to slide a finger under it.
Headband types and how each fits
Only stretch bands depend on an exact circumference. Hard bands and tie bands work differently, which is why "one size" is common for them.
| Type | How it fits | Sizing |
|---|---|---|
| Nylon or soft elastic (baby) | Stretches around the whole head | By age or head size; very stretchy, so one band often covers 0–12 months |
| Knit or jersey stretch band | Closed loop of stretch fabric | S/M/L or child/adult; finished 1–2 in under head size |
| Hard band (Alice band) | U-shaped plastic or metal spring grips behind the ears | Child or adult; adult bands usually fit school-age children |
| Fabric band with elastic back | Rigid front, elastic section at the nape | One size for adults, sometimes a child size |
| Tie or wire-wrap band | Knotted or twisted to fit | One size, adjusts to any head |
| Sports sweatband | Terry or performance knit loop | One size adult, sometimes youth |
| Ear warmer band | Wide knit or fleece loop over the ears | One size, or S/M and L/XL |
If a hard headband gives you a headache behind the ears, the problem is spring tension, not size. Bending the arms outward slightly over a warm mug reduces the grip of most plastic bands; metal bands can be eased by hand. Hard bands with teeth grip better on fine hair and need less tension.
Headband widths
Width changes both the look and how well a band stays put. Narrow bands grip a small area and slip more on smooth hair; wide bands spread the pressure.
| Width | Metric | Typical style |
|---|---|---|
| 1/8–1/4 in | 3–6 mm | Thin elastic and metal bands, worn in pairs or behind a fringe |
| 1/2–1 in | 12–25 mm | Everyday hard bands and skinny elastic bands |
| 1.5–2 in | 38–50 mm | Padded and knotted bands, sports bands |
| 2–2.5 in | 50–65 mm | Sweatbands, yoga and running bands |
| 3–4.5 in | 75–115 mm | Turban-style, wide knit and ear-warmer bands |
Baby bands are usually narrower than adult versions: 1/4 to 1 in for nylon and elastic, with any bow added on top. For a toddler, a band wider than about 2 in tends to slide down over the eyes.
Making a headband: cut lengths that fit
Stretch fabric and elastic need negative ease, meaning the finished loop is smaller than the head. How much smaller depends on how far the material stretches.
- Measure the head where the band will sit, or use the chart above.
- Subtract the ease. For cotton-spandex jersey, finish the loop 1 to 2 in (2.5 to 5 cm) smaller than the head. For firm braided elastic, subtract about 2 in. For very stretchy baby nylon, subtract 3 in or more on a newborn.
- Add the seam allowance. Add 1/2 in (1.3 cm) for a sewn seam on a fabric loop, or the overlap you need to join elastic.
- Cut the width. For a folded fabric band, cut the strip twice the finished width plus 1/2 in for seams. A 2 in finished band needs a 4.5 in strip.
Worked example: an adult head of 22 in (56 cm) in cotton-spandex jersey. Finish at 20.5 in, add 0.5 in seam allowance, and cut a strip 21 in long. For a 2 in finished width, cut it 4.5 in wide, so the piece is 21 × 4.5 in (53 × 11.5 cm).
Pin the loop and wear it for 10 minutes before sewing the final seam. Fabrics with different spandex content behave very differently, and a band that feels fine for a minute can ache after an hour.
Choosing a size when buying
- Between two sizes: choose the larger one for stretch bands worn all day, and the smaller one for sports bands that must not move.
- Thick or curly hair: wearing the band over a lot of hair adds circumference. Measure over the hair, not the scalp.
- Babies near a size boundary: buy up. Head circumference grows about 2 cm a month in the first three months.
- Matching sets: winter headbands are often sold alongside scarves; the scarf size guide covers lengths and widths for children and adults, and the athletic wear size guide covers sports kit that sweatbands are worn with.
Frequently asked questions
What is the average headband size for kids?
For toddlers (1 to 3 years) most heads measure 18 to 19.5 in (46 to 49.5 cm), and for school-age children 19.5 to 21 in (49.5 to 53 cm). A stretch headband for those heads is usually finished at 16.5 to 18 in and 18 to 19.5 in respectively.
Do adult headbands fit kids?
Often. Hard plastic or metal headbands grip by spring tension across the head rather than by circumference, so adult hard bands usually fit school-age children, sometimes with a firmer squeeze. Elastic adult bands are finished around 19.5 to 22 in, so they slip on heads under about 19 in (48 cm).
How tight should a baby headband be?
Loose enough that you can slide one finger under it all the way round, and it should leave no mark when removed. Never leave a headband on a sleeping or unsupervised baby, because it can slip down over the face or around the neck.
How long should elastic be for a headband?
For a full elastic band, cut the elastic about 2 in (5 cm) shorter than the head circumference, plus 1/2 in for the overlap seam. For a fabric band with an elastic section at the back, the elastic piece is usually 3 to 5 in long.
What width headband is best for sport?
Sweatbands for running and court sports are typically 2 to 2.5 in (5 to 6.5 cm) wide, which covers the forehead without reaching the eyebrows. Thin 1/4 to 1/2 in elastic bands hold hair back but do not absorb much sweat.