children's size guide UK Children's Size Guide (UK standard sizes)
children's size guide UK Sizing can be tricky when kids grow so fast — we get it. Use this guide to find the right fit, and remember: when in doubt, size up. Many of our items also feature growth hems for extra wear.
📏 How to Measure
Height: Stand the child flat against a wall, barefoot, and measure from the floor to the top of their head.
Chest: Measure around the fullest part of the chest, keeping the tape level and snug (not tight).
Waist: Measure around the natural waistline, just above the belly button.children's size guide UK
Hips: Measure around the fullest part of the hips.children's size guide UK
👖 Trousers & Shorts
Measure the waist and inside leg for the best fit.
Age |
Height (cm) |
Waist (cm) |
Inside Leg (cm) |
|---|---|---|---|
2–3 yrs |
92–98 |
50–53 |
36–39 |
3–4 yrs |
98–104 |
53–55 |
39–42 |
4–5 yrs |
104–110 |
55–57 |
42–45 |
5–6 yrs |
110–116 |
57–59 |
45–48 |
6–7 yrs |
116–122 |
59–61 |
48–51 |
7–8 yrs |
122–128 |
61–63 |
51–54 |
8–9 yrs |
128–134 |
63–65 |
54–57 |
9–10 yrs |
134–140 |
65–67 |
57–60 |
10–11 yrs |
140–146 |
67–69 |
60–63 |
11–12 yrs |
146–152 |
69–72 |
63–66 |
12–13 yrs |
152–158 |
72–75 |
66–69 |
Tip: Many school trousers come with growth hems — check the product description, as these add up to 4cm of extra leg length.
👔 Shirts & Blouses (School)
Measure the chest and, for long sleeves, the arm length.
Age |
Height (cm) |
Chest (cm) |
Collar Size |
|---|---|---|---|
3–4 yrs |
98–104 |
55–57 |
11" |
4–5 yrs |
104–110 |
57–59 |
11.5" |
5–6 yrs |
110–116 |
59–61 |
12" |
6–7 yrs |
116–122 |
61–63 |
12.5" |
7–8 yrs |
122–128 |
63–65 |
13" |
8–9 yrs |
128–134 |
65–67 |
13.5" |
9–10 yrs |
134–140 |
67–69 |
14" |
10–11 yrs |
140–146 |
69–71 |
14.5" |
11–12 yrs |
146–152 |
71–74 |
15" |
12–13 yrs |
152–158 |
74–77 |
15.5" |
Tip: If the collar size is tight but the body fits, size up — a collar that’s too snug will be uncomfortable all day.
🧦 Socks
UK Shoe Size |
Approx. Age |
Sock Size |
|---|---|---|
4–7 |
2–4 yrs |
6–9 (small) |
8–10 |
4–6 yrs |
9–12 (medium) |
11–2 |
6–9 yrs |
11–2 (large) |
3–5 |
9–12 yrs |
1–5 (extra large) |
Tip: Socks are non-returnable for hygiene reasons, so check your child’s current shoe size before ordering.
👟 How to Measure Feet (for Shoes)
Getting shoe size right is important — and kids’ feet grow faster than you’d think (roughly a size every few months in younger children!).
Steps:
Put a piece of paper on the floor against a wall, and tape it down so it doesn’t move.
Have your child stand on the paper with their heel against the wall — standing with their weight on the foot gives a true measurement (sitting gives a smaller, inaccurate size).children's size guide UK
Make sure they’re sockless.
Mark the longest toe — this isn’t always the big toe!
Measure the distance from the edge of the paper (the wall/heel line) to the toe mark.
Size tip: Compare the measurement in cm to our shoe size chart (above), and aim for about a thumb’s width (1cm) of growing room at the toe.
👟 Shoes
Measure the foot in cm and match to UK sizes below.
UK Size |
Foot Length (cm) |
Approx. Age |
|---|---|---|
5 |
12.5 |
1–2 yrs |
6 |
13.2 |
2–3 yrs |
7 |
14.0 |
3–4 yrs |
8 |
14.8 |
3–4 yrs |
9 |
15.5 |
4–5 yrs |
10 |
16.3 |
5–6 yrs |
11 |
17.0 |
6–7 yrs |
12 |
17.8 |
7–8 yrs |
13 |
18.5 |
8–9 yrs |
1 |
19.3 |
9–10 yrs |
2 |
20.0 |
10–11 yrs |
3 |
20.8 |
11–12 yrs |
4 |
21.5 |
12–13 yrs |
Tip: Leave about a thumb’s width (roughly 1cm) of growing room at the toe.