Here's a general size chart for kids' t-shirts for children under 5 years old. These measurements are approximate and may vary by brand or manufacturer.
Size
Age (Years)
Chest (inches)
Length (inches)
12 Months
1
18-20
12-14
23M
2
20-21
14-15
35M
3
21-22
15-16
47M
4
22-23
16-17
5Y
5
23-24
17-18
How to Measure:
Chest: Measure around the fullest part of the child’s chest.
Length: Measure from the highest point of the shoulder to the bottom hem of the t-shirt.
