🎒 School Uniform
School Uniform Size for a 12 Year Old
Age 12–13 years uniform: chest 30–31", waist 25–26", height 152–158 cm.
A 12 year old usually wears age 12–13 years uniform — height 152–158 cm, chest 76–80 cm (30–31"), waist 64–66 cm (25–26"). Buy blazers by chest, trousers by waist, and size up for growing room.
Age 12–13 · chest 30–31"
Height 152–158 cm · waist 25–26"
UK school uniform chart by age:
| Age | Height | Chest | Waist |
|---|---|---|---|
| 3–4 years | 98–104 cm | 53–55 cm | 51–53 cm |
| 4–5 years | 104–110 cm | 55–57 cm | 52–54 cm |
| 5–6 years | 110–116 cm | 57–59 cm | 53–55 cm |
| 6–7 years | 116–122 cm | 59–61 cm | 54–56 cm |
| 7–8 years | 122–128 cm | 61–64 cm | 55–57 cm |
| 8–9 years | 128–134 cm | 64–67 cm | 56–58 cm |
| 9–10 years | 134–140 cm | 67–70 cm | 57–59 cm |
| 10–11 years | 140–146 cm | 70–73 cm | 58–61 cm |
| 11–12 years | 146–152 cm | 73–76 cm | 61–64 cm |
| 12–13 years | 152–158 cm | 76–80 cm | 64–66 cm |
| 13–14 years | 158–164 cm | 80–84 cm | 66–69 cm |
| 14–15 years | 164–170 cm | 84–88 cm | 69–72 cm |
| 15–16 years | 170–176 cm | 88–92 cm | 72–76 cm |
⚠️ Age is a guide — children of the same age vary. Measure chest and waist, and size up for a school year of growth.
Uniform size calculator → · All school uniform guides →
What school uniform size for a 12 year old?
A 12 year old is typically age 12–13, with a chest of 76–80 cm (30–31") and waist 64–66 cm (25–26"). Measure and size up for growing room.
Should I buy uniform by age or measurement?
By measurement — blazers and jumpers by chest, trousers and skirts by waist. Age is a guide; children of the same age vary.
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