To choose the right size for a child's T-shirt, compare the measurements below with those of a T-shirt that fits them well, laid flat.
Measure the width from one armpit to the other and the length from the top of the shoulder to the bottom of the T-shirt. The flat width is not the chest circumference.
Ages are provided as a guide only: prioritize the garment measurements when choosing the size.
| Size | Approx. Age | Width flat (cm) | Width (inches) | Length (cm) | Length (inches) |
|---|---|---|---|---|---|
| XS | 3–4 years | 41 | 16.14″ | 52 | 20.47″ |
| S | 5–6 years | 43 | 16.93″ | 56 | 22.05″ |
| M | 7–8 years | 46 | 18.11″ | 60 | 23.62″ |
| L | 9–11 years | 48 | 18.90″ | 64 | 25.20″ |
| XL | 12–14 years | 51 | 20.08″ | 67 | 26.38″ |