These are the flexible sizes for respective age group as per mentioned in CM

Kids (Size in CM)
Size Increase	Approx Age	Chest (CM)	Waist (CM)	Hips (CM)	Inside Leg Length (CM)
152	12Y	76	65	81	72.5
158	13Y	79	67	84	75
164	14Y	82	69	87	78.5
170	14+Y	85	71	90	82

 

T-shirt for a boy:

• longer back
• slightly convex print

Material and technologies:

• 100% cotton (weight 160 g/m2)
• Oeko-Tex Standard 100 certificate

Washing and care:

• Wash with similar colors at a temperature of up to 40° C.
• Wash and iron on the left side.