Infant Long and Short Sleeve Tee:  Size 00  0  1   To fit age  3-6 mths 6-12 mths  12-18 mths  Children's Long and Short Sleeve Tee:  Size 2 4 6 8 10 12 Garment measured flat across chest (cm) 32.5 35  37.5 40 42.5 45  Fitted Girls Short Sleeve Tee:  Size 8 10 12 14 Garment measured flat across chest (cm)  36  38.5  41  43.5