School Trousers Size Guide

School trousers fit by waist (and inside leg) — many have adjustable waistbands for growing room.

School trousers are sized by waist, with inside leg as a secondary measure. Many have adjustable waistbands — a real help for growing children. Measure the natural waistline, not where low-rise jeans sit.

Sized by waist

Adjustable waistbands give growing room

School trouser waist sizes by age:

Age	Waist (in)	Waist (cm)	Height
3–4 years	20–21"	51–53 cm	98–104 cm
4–5 years	20–21"	52–54 cm	104–110 cm
5–6 years	21–22"	53–55 cm	110–116 cm
6–7 years	21–22"	54–56 cm	116–122 cm
7–8 years	22"	55–57 cm	122–128 cm
8–9 years	22–23"	56–58 cm	128–134 cm
9–10 years	22–23"	57–59 cm	134–140 cm
10–11 years	23–24"	58–61 cm	140–146 cm
11–12 years	24–25"	61–64 cm	146–152 cm
12–13 years	25–26"	64–66 cm	152–158 cm
13–14 years	26–27"	66–69 cm	158–164 cm
14–15 years	27–28"	69–72 cm	164–170 cm
15–16 years	28–30"	72–76 cm	170–176 cm