Clothing Size for a 3 Year Old

What clothing size fits a 3 year old? Lead with height — a 3 year old is typically 98–105 cm tall.

Reviewed by the 247Sizing teamLast updated: 12 August 2026

A 3 year old typically wears US 3T (EU/UK 104 cm). But age is only a guide — measure your child's height and choose by that.

3 years → US 3T

EU/UK 104 cm · height 98–105 cm · weight 14–16 kg

Full baby & kids size chart (measure height to be sure):

US	EU/UK (cm)	Age	Height	Weight
Newborn	56 cm	0–1 month	50–56 cm	2.5–4 kg
0–3M	62 cm	0–3 months	56–62 cm	4–6 kg
3–6M	68 cm	3–6 months	62–68 cm	6–8 kg
6–9M	74 cm	6–9 months	68–74 cm	8–9 kg
9–12M	80 cm	9–12 months	74–80 cm	9–11 kg
12–18M	86 cm	12–18 months	80–86 cm	11–12 kg
18–24M	92 cm	18–24 months	86–92 cm	12–14 kg
2T	98 cm	2 years	92–98 cm	13–15 kg
3T	104 cm	3 years	98–105 cm	14–16 kg
4T	110 cm	4 years	105–112 cm	16–18 kg
5	116 cm	5 years	110–118 cm	18–21 kg
6	122 cm	6 years	116–122 cm	20–23 kg
7	128 cm	7 years	122–128 cm	23–26 kg
8	134 cm	8 years	128–134 cm	25–30 kg
10	140 cm	10 years	134–140 cm	30–36 kg
12	152 cm	12 years	140–152 cm	36–45 kg
14	158 cm	14 years	152–158 cm	45–50 kg

⚠️ Measure, don't guess by age. Children of the same age vary a lot — choose by height and size up if they're between sizes or growing fast.

What size clothes for a 3 year old?

Typically US 3T (EU/UK 104 cm), for a child about 98–105 cm tall and 14–16 kg. Measure height to be sure.

Should I buy by age or size?

By height. Children of the same age vary widely, so height (the EU/UK cm label) is the reliable guide — size up if they're growing fast.

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