At a glance: height, age and size
Numeric kids' sizes usually track your child's reference height in cm: a 110 fits a child around 110 cm tall, about 4–5 years old. The number in a US T size roughly matches age, so 2T is about 2 years. Ages are general guidance only — check the brand's size chart and the garment's measurements before you buy.
| Height / numeric size (cm) | Approximate age | US size |
|---|---|---|
| 60–70 | About 0–6 months | 0–6M |
| 70–80 | About 6–12 months | 6–12M |
| 80–90 | About 1–2 years | 12–24M |
| 90–100 | About 2–3 years | 2T–3T |
| 100–110 | About 3–4 years | 3T–4T |
| 110–120 | About 4–6 years | 4T–5T |
| 120–130 | About 6–8 years | Varies by brand |
| 130–140 | About 8–10 years | Varies by brand |
| 140–150 | About 10–12 years | Varies by brand |
| 150–160 | About 12–14 years | Varies by brand |
The age column is a rough guide to typical growth, not a brand conversion; children of the same age can differ a lot in height. Japanese and Taiwanese numeric sizes and European EU sizes (such as 104, 110 and 116) are mostly labelled by height in cm, so read them against the first column. US big-kid sizes above 5T vary widely by brand and gender, so check that brand's chart.
Three things to remember
- 1Numeric sizes usually track reference height; month and T sizes are only rough ranges.
- 2The most reliable method is to measure a well-fitting garment: body length, chest width, waist width and inseam.
- 3When buying across brands, keep the original size as labelled instead of forcing everything onto one scale.
Common kids' sizes: quick reference
The table below is an entry point for reading labels, not a guarantee for any particular brand. Your child's build, the cut, the stretch of the fabric and how they like clothes to fit all affect the choice.
| Common numeric size | Common month / T size | Reference height | Check when buying |
|---|---|---|---|
| 60–70 | 0–6M | About 55–70 cm | Bodysuit crotch length and nappy room |
| 70–80 | 6–12M | About 65–80 cm | Shoulder width, cuffs and head opening |
| 80–90 | 12–24M | About 75–90 cm | Body length, rise and room to move |
| 90–100 | 2T–3T | About 85–100 cm | Waist, inseam and whether nappies are still worn |
| 100–110 | 3T–4T | About 95–110 cm | Chest width, shoulder seam and sleeve length |
| 110–120 | 4T–5T | About 105–120 cm | Actual body length and the brand's cut |
Size guides by country
For how a particular country labels kids' sizes, read on:
- Japanese sizesJapanese kids' clothing sizes: what age is each size from 50 to 160?
- Australian sizesAustralian kids' clothing sizes from 000 to 16: age and height chart
- Sizes in SingaporeKids' clothing sizes in Singapore: UK, EU, US and Asian sizes compared
- Korean and Thai sizesKorean and Thai kids' clothing sizes: how cm sizes, Korean numbers and S/M/L compare
More reliable than measuring your child: use a well-fitting garment as your benchmark
- 1
Pick a well-fitting garment of the same kind
Compare top with top, dress with dress, trousers with trousers. Lengths from different categories can't be compared directly.
- 2
Lay it flat and measure the key points
For tops, measure the body length and the chest width across the underarms; for trousers, the waist width, rise and inseam; for dresses, check the shoulder width and skirt length as well.
- 3
Compare against the garment measurements the brand publishes
Check whether the chart lists flat garment measurements or body measurements, and whether a flat chest width needs doubling before you compare it with a chest measurement.
- 4
Leave sensible room for the season
Wearing it now and wearing it in six months are different questions. Work out how long it will be worn, then allow for layers underneath and whether the fabric shrinks in the wash.
Different categories, different numbers to watch
| Category | Measure first | Common mistake |
|---|---|---|
| Tops / outerwear | Chest width, body length, sleeve length | Going by height alone and forgetting layer thickness |
| Trousers | Waist width, rise, inseam | An elastic waist that's still too tight, or a rise that's too short |
| Dresses | Shoulder width, chest width, skirt length | The width fits but the skirt length isn't what you expected |
| Bodysuits | Shoulder-to-crotch length, head opening | The body fits but the snaps won't close |
| Hats / shoes and socks | Head circumference / foot length | Choosing by age alone instead of centimetres |
How should you record sizes so you can find things later?
When you add an item, keep the size exactly as the label writes it — 90, 2T, 12–18M — rather than rewriting everything as an age you've guessed. If you need more detail, add your own tags such as “runs small”, “long cut” or “good for layering”.
Whenever you notice something now fits or has become too small, mark it “wear soon” or “for sale”. That's far more reliable than trying to predict your child's future height, and it gives each change of season something concrete to act on.
A five-second check before buying online
- Which season is this for?
- Does the brand's chart give body measurements or flat garment measurements?
- What does a well-fitting garment of the same kind actually measure?
- Is the fabric stretchy, will it be layered over something thick, or will it shrink in the wash?
- If you're unsure of the size, will the seller send photos with a tape measure?
Frequently asked questions
Common questions
What age is 110 cm?
Usually around 4–5 years. A size 110 is generally close to a height of 110 cm, which sits around US 4T on this chart. Children of the same age vary a lot in height and brands cut differently, so go by your child's actual height, the brand's size chart and the garment's measurements.
What age is a kids' size 90?
It's often around 1–2 years, but brands vary a lot. Treat 90 as a pointer to the 90 cm height band, and still go by the brand's size chart and the garment's measurements.
What is a kids' size 2 in cm?
There is no single answer. A "size 2" is a brand's own size code, and brands map it to different heights. Check the height that brand's chart gives for size 2; if the brand says size 2 is for about age 2, start from the rows around 90 cm on this page, then confirm with body length and chest width.
What size is 100–110 cm?
Start with numeric size 100 or 110, which is roughly US 3T–4T, about 3–4 years old. If your child is already close to 110 cm, or you want it to last another season, choose 110; in European sizing, look at EU 104 or 110. The brand's size chart and the garment's measurements have the final say.
What age is European size 110/116?
European kids' sizes are mostly labelled by height, so 110/116 fits a child roughly 110 to 116 cm tall — about 4–5 years on this chart. Cuts still vary by brand, so check the brand's size chart before you buy.
Are 2T and 90 the same?
They may cover a similar range, but they aren't interchangeable. The waist, hips and rise of a 2T can differ noticeably from a 90 in another brand.
Should I size up?
Not always. Outerwear can allow room for layers, but a neckline, shoulder seam, rise or shoe that is too big also affects movement and safety. Go by the measurements and the season you expect it to be worn.
Put the method to work in a wardrobe you can search
The free plan holds 50 garments. Start with the one you most want to sort out today — there's no need to do everything at once.