With kids t-shirt sizes depend on whether the child is big or small for their age, i.e: a big 3 year old will wear a medium as will a small 6 year old. Super soft 100% semi-combed cotton jersey t-shirt with classic round collar neck and short sleeves.
Small: age 1 - 3 years old. Chest 31cm Length 41cm
Medium: age 3 - 6 years old. Chest 37cm Length 47cm
Large : age 6 - 9 years old. Chest 43 cm Length 54cm
X-Large: age 9 - 11 years old. Chest 46cm Length 58cm