How kids' clothing sizes work
For kids the UK size equals the US size — a US 6 is a UK 6, unlike women’s dresses, where the UK size is the US size + 4. The EU size is the child’s height in centimetres — an EU 116 fits a child about 116 cm tall — and the sizes step by 6 cm: 92, 98, 104, 110, 116, 122, 128, then 140, 152, 164, 176. The “T” in 2T, 3T and 4T stands for toddler — toddler sizes are cut shorter and roomier in the nappy area than the same-number regular sizes. From age 5 the sizes are plain numbers: 5, 6, 7, 8, 10, 12, 14, 16.
Five things about the model are worth stating plainly. First, the table is indexed by age, and the UK size equals the US size for every row. Second, the EU size is the height in centimetres, stepped to the standard sizes. Third, height in centimetres is height in inches × 2.54, rounded to the nearest whole centimetre — 44 × 2.54 = 111.76 cm, which rounds to 112 cm. Fourth, height is the reliable column, not age — a tall 6-year-old may need a size 7, and the height range in the table is what to measure against. And fifth, brands vary, so always check the brand’s own chart before ordering; all listed in Accuracy & limitations.
The worked example, line by line
Setup: age 6.
Line 1 — the US size. The US size for age 6 is 6.
Line 2 — the UK size. The UK size equals the US size, so it is 6.
Line 3 — the EU size. The EU size is the height in centimetres: 116 cm, so it is 116.
Line 4 — the height. The height range for age 6 is 44–47 in, which is 44 × 2.54 = 111.76 → 112 cm to 47 × 2.54 = 119.38 → 119 cm.
Line 5 — a tall 6-year-old. A 6-year-old who is 48 inches tall is in the 47–50 in row, which is age 7 — a whole size apart from age 6.
Table 1 — Kids’ clothing sizes by age
| Age | US | UK | EU | Height (in) | Height (cm) |
|---|
| 2 | 2T | 2 | 92 | 33–35 | 84–89 |
| 3 | 3T | 3 | 98 | 35–38 | 89–97 |
| 4 | 4T | 4 | 104 | 38–41 | 97–104 |
| 5 | 5 | 5 | 110 | 41–44 | 104–112 |
| 6 | 6 | 6 | 116 | 44–47 | 112–119 |
| 7 | 7 | 7 | 122 | 47–50 | 119–127 |
| 8 | 8 | 8 | 128 | 50–53 | 127–135 |
| 10 | 10 | 10 | 140 | 53–57 | 135–145 |
| 12 | 12 | 12 | 152 | 57–61 | 145–155 |
| 14 | 14 | 14 | 164 | 61–65 | 155–165 |
| 16 | 16 | 16 | 176 | 65–68 | 165–173 |
For kids the UK size equals the US size — a US 6 is a UK 6 — and the EU size is the child’s height in centimetres — an EU 116 fits a child about 116 cm tall.
Every branch, checked
Age 2: Age 2: US 2T, UK 2, EU 92, height 33–35 in (84–89 cm) — A 2-year-old wears a US 2T, a UK 2 and an EU 92 — height 33–35 in (84–89 cm).
Age 4: Age 4: US 4T, UK 4, EU 104, height 38–41 in (97–104 cm) — A 4-year-old wears a US 4T, a UK 4 and an EU 104 — height 38–41 in (97–104 cm).
Age 8: Age 8: US 8, UK 8, EU 128, height 50–53 in (127–135 cm) — An 8-year-old wears a US 8, a UK 8 and an EU 128 — height 50–53 in (127–135 cm).
Age 10: Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm) — A 10-year-old wears a US 10, a UK 10 and an EU 140 — height 53–57 in (135–145 cm).
Age 12: Age 12: US 12, UK 12, EU 152, height 57–61 in (145–155 cm) — A 12-year-old wears a US 12, a UK 12 and an EU 152 — height 57–61 in (145–155 cm).
Age 14: Age 14: US 14, UK 14, EU 164, height 61–65 in (155–165 cm) — A 14-year-old wears a US 14, a UK 14 and an EU 164 — height 61–65 in (155–165 cm).
Age 16: Age 16: US 16, UK 16, EU 176, height 65–68 in (165–173 cm) — A 16-year-old wears a US 16, a UK 16 and an EU 176 — height 65–68 in (165–173 cm).
The reverses, worked backwards
Eu 140 is which age and us size: An EU 140 is age 10, US 10 (exact). Age 10 is a UK 10 and an EU 140 — height 53–57 in (135–145 cm).
Eu 116 is which age and us size: An EU 116 is age 6, US 6 (exact). Age 6 is a UK 6 and an EU 116 — height 44–47 in (112–119 cm).
A 51-inch-tall child is which size: A 51-inch-tall child wears a US 8, EU 128 (exact — 51 in falls inside the 50–53 in row only).
Eu 164 is which age and us size: An EU 164 is age 14, US 14 (exact). Age 14 is a UK 14 and an EU 164 — height 61–65 in (155–165 cm).
Smallest age with an eu size of at least 150: The smallest age with an EU size of at least 150 is age 12 (exact STEP). Age 12 is an EU 152; age 10 is an EU 140 — under 150.
A 59-inch-tall child is which size: A 59-inch-tall child wears a US 12, EU 152 (exact — 59 in falls inside the 57–61 in row only).
What the defaults assume
The defaults are age 6 — Age 6: US 6, UK 6, EU 116, height 44–47 in (112–119 cm). With age 2, Age 2: US 2T, UK 2, EU 92, height 33–35 in (84–89 cm) — A 2-year-old wears a US 2T, a UK 2 and an EU 92 — height 33–35 in (84–89 cm). With age 4, Age 4: US 4T, UK 4, EU 104, height 38–41 in (97–104 cm) — A 4-year-old wears a US 4T, a UK 4 and an EU 104 — height 38–41 in (97–104 cm). With age 8, Age 8: US 8, UK 8, EU 128, height 50–53 in (127–135 cm) — An 8-year-old wears a US 8, a UK 8 and an EU 128 — height 50–53 in (127–135 cm). With age 10, Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm) — A 10-year-old wears a US 10, a UK 10 and an EU 140 — height 53–57 in (135–145 cm). With age 12, Age 12: US 12, UK 12, EU 152, height 57–61 in (145–155 cm) — A 12-year-old wears a US 12, a UK 12 and an EU 152 — height 57–61 in (145–155 cm). With age 14, Age 14: US 14, UK 14, EU 164, height 61–65 in (155–165 cm) — A 14-year-old wears a US 14, a UK 14 and an EU 164 — height 61–65 in (155–165 cm). With age 16, Age 16: US 16, UK 16, EU 176, height 65–68 in (165–173 cm) — A 16-year-old wears a US 16, a UK 16 and an EU 176 — height 65–68 in (165–173 cm). With age 3, Age 3: US 3T, UK 3, EU 98, height 35–38 in (89–97 cm) — A 3-year-old wears a US 3T, a UK 3 and an EU 98 — height 35–38 in (89–97 cm). With age 5, Age 5: US 5, UK 5, EU 110, height 41–44 in (104–112 cm) — A 5-year-old wears a US 5, a UK 5 and an EU 110 — height 41–44 in (104–112 cm). With age 7, Age 7: US 7, UK 7, EU 122, height 47–50 in (119–127 cm) — A 7-year-old wears a US 7, a UK 7 and an EU 122 — height 47–50 in (119–127 cm). With youngest row, age 2, Age 2: US 2T, UK 2, EU 92, height 33–35 in (84–89 cm) — The youngest row in the table — a 2-year-old wears a US 2T, a UK 2 and an EU 92. With oldest row, age 16, Age 16: US 16, UK 16, EU 176, height 65–68 in (165–173 cm) — The oldest row in the table — a 16-year-old wears a US 16, a UK 16 and an EU 176. With EU 92 is which age, Age 2: US 2T, UK 2, EU 92, height 33–35 in (84–89 cm) — An EU 92 is age 2, US 2T. With EU 176 is which age, Age 16: US 16, UK 16, EU 176, height 65–68 in (165–173 cm) — An EU 176 is age 16, US 16.
Output · formula · meaning
| Output | Formula | What it means |
|---|
| Age | input | 6. |
| US size | age row | 6. |
| UK size | UK = US | 6. |
| EU size | height in cm, standard steps | 116. |
| Height (in) | age row | 44–47 in. |
| Height (cm) | height in inches × 2.54, rounded | 112–119 cm. |
| EU 140 is which age and US size | exact 10 | age 10, US 10 → age 10, US 10. |
| Below the revr1 star | neighbor | Age 8: US 8, UK 8, EU 128, height 50–53 in (127–135 cm). |
| Above the revr1 star | neighbor | Age 12: US 12, UK 12, EU 152, height 57–61 in (145–155 cm). |
| EU 116 is which age and US size | exact 6 | age 6, US 6 → age 6, US 6. |
| Below the revr2 star | neighbor | Age 5: US 5, UK 5, EU 110, height 41–44 in (104–112 cm). |
| Above the revr2 star | neighbor | Age 7: US 7, UK 7, EU 122, height 47–50 in (119–127 cm). |
| a 51-inch-tall child is which size | exact 8 | US 8, EU 128 → US 8, EU 128. |
| Below the revr3 star | neighbor | Age 7: US 7, UK 7, EU 122, height 47–50 in (119–127 cm). |
| Above the revr3 star | neighbor | Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm). |
| EU 164 is which age and US size | exact 14 | age 14, US 14 → age 14, US 14. |
| Below the revr4 star | neighbor | Age 12: US 12, UK 12, EU 152, height 57–61 in (145–155 cm). |
| Above the revr4 star | neighbor | Age 16: US 16, UK 16, EU 176, height 65–68 in (165–173 cm). |
| smallest age with an EU size of at least 150 | exact 12 | age 12 → age 12. |
| Below the revr5 star | neighbor | Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm). |
| Above the revr5 star | neighbor | Age 14: US 14, UK 14, EU 164, height 61–65 in (155–165 cm). |
| a 59-inch-tall child is which size | exact 12 | US 12, EU 152 → US 12, EU 152. |
| Below the revr6 star | neighbor | Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm). |
| Above the revr6 star | neighbor | Age 14: US 14, UK 14, EU 164, height 61–65 in (155–165 cm). |
| age 2 | same model | Age 2: US 2T, UK 2, EU 92, height 33–35 in (84–89 cm). |
| age 4 | same model | Age 4: US 4T, UK 4, EU 104, height 38–41 in (97–104 cm). |
| age 8 | same model | Age 8: US 8, UK 8, EU 128, height 50–53 in (127–135 cm). |
| age 10 | same model | Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm). |
| age 12 | same model | Age 12: US 12, UK 12, EU 152, height 57–61 in (145–155 cm). |
| age 14 | same model | Age 14: US 14, UK 14, EU 164, height 61–65 in (155–165 cm). |
| age 16 | same model | Age 16: US 16, UK 16, EU 176, height 65–68 in (165–173 cm). |
Who uses this
- The parent ordering clothes online: they learn a 6-year-old wears a US 6, a UK 6 and an EU 116 — and they check the age-8 branch for the next size up.
- The parent whose child is between sizes: they learn a 51-inch-tall child wears a US 8, EU 128 — and they check the R3 reverse to see why the height column decides.
- The grandparent buying a gift: they learn an EU 140 is age 10, US 10 — and they check the EU 164 reverse to see the age-14 size.
- The shopper reading a European label: they learn an EU 152 is age 12, US 12 — and they check the R5 reverse to see that age 12 is the smallest age with an EU size of at least 150.
Accuracy & limitations
The table is the standard published kids’ size chart: UK = US for every row; the EU size is the height in centimetres, stepped to the standard sizes 92, 98, 104, 110, 116, 122, 128, 140, 152, 164, 176; height in centimetres is height in inches × 2.54, rounded to the nearest whole centimetre. What the calculator cannot do is fit your child: brands vary, so always check the brand’s own chart before ordering; age is only a starting point — two 6-year-olds can be 44 inches or 48 inches tall, which is a whole size apart; height is the reliable column, not age — measure height standing barefoot against a wall, and measure the chest at its widest point if the brand lists one; if a child falls between two sizes, size up for jackets and trousers they will grow into, and size down for stretchy tops. Use the height range, not the age — then check the brand’s chart.
Cite this calculatorBright Side Kit. “Kids' Clothing Size Chart: US, UK & EU Sizes by Age” brightoolbox.com, 2026. Method: the table is indexed by age; UK = US for every row; EU = the height in centimetres, stepped to the standard sizes; height in centimetres = height in inches × 2.54, rounded to the nearest whole centimetre. Reverses: EU 140 is which age and US size is age 10, US 10 (at age 10, US 10 the figures are Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm); at the lower neighbor the figures are Age 8: US 8, UK 8, EU 128, height 50–53 in (127–135 cm)); EU 116 is which age and US size is age 6, US 6 (at age 6, US 6 the figures are Age 6: US 6, UK 6, EU 116, height 44–47 in (112–119 cm); at the lower neighbor the figures are Age 5: US 5, UK 5, EU 110, height 41–44 in (104–112 cm)); a 51-inch-tall child is which size is US 8, EU 128 (at US 8, EU 128 the figures are Age 8: US 8, UK 8, EU 128, height 50–53 in (127–135 cm); at the lower neighbor the figures are Age 7: US 7, UK 7, EU 122, height 47–50 in (119–127 cm)); EU 164 is which age and US size is age 14, US 14 (at age 14, US 14 the figures are Age 14: US 14, UK 14, EU 164, height 61–65 in (155–165 cm); at the lower neighbor the figures are Age 12: US 12, UK 12, EU 152, height 57–61 in (145–155 cm)); smallest age with an EU size of at least 150 is age 12 (at age 12 the figures are Age 12: US 12, UK 12, EU 152, height 57–61 in (145–155 cm); at the lower neighbor the figures are Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm)); a 59-inch-tall child is which size is US 12, EU 152 (at US 12, EU 152 the figures are Age 12: US 12, UK 12, EU 152, height 57–61 in (145–155 cm); at the lower neighbor the figures are Age 10: US 10, UK 10, EU 140, height 53–57 in (135–145 cm)). Defaults: Age 6: US 6, UK 6, EU 116, height 44–47 in (112–119 cm) Bright Side Kit. "Kids' Clothing Size Chart: US, UK & EU Sizes by Age" https://brightoolbox.com/kids-clothing-size-chart/ Accessed October 26, 2026.
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Frequently asked questions
What size does a 6-year-old wear?
A US 6, a UK 6 and an EU 116. A 6-year-old is about 44–47 inches tall (112–119 cm).
Is a UK kids' size the same as the US size?
Yes. For kids the UK size equals the US size — a US 6 is a UK 6. That is different from women’s dresses, where the UK size is the US size + 4.
What does an EU 116 mean?
It is the child’s height in centimetres. An EU 116 fits a child about 116 cm tall.
What does the T mean in 2T, 3T and 4T?
Toddler. Toddler sizes are cut shorter and roomier in the nappy area than the same-number regular sizes.
What size is a 51-inch-tall child?
A US 8, EU 128. 51 inches falls inside the 50–53 in row only — the age-8 row.
What is the smallest age with an EU size of at least 150?
Age 12, EU 152. Age 10 is an EU 140 — under 150.
My child is between two sizes — size up or down?
Size up for jackets and trousers they will grow into, and size down for stretchy tops.
How do I measure my child's height?
Standing barefoot against a wall. Measure the chest at its widest point if the brand lists one.