Newborn S M 0-3 Month 0-6 Month 0-24 Month 3-6 Month 6-9 Month 6-12 Month 9-12 Month 12-18 Month 18-24 Month 1-2 Year 2 Year 2-3 Year 2-4 Year 2.5 Year 3 Year 3-4 Year 3.5 Year 4 Year 4-6 Year 4-8 Year 4-10 Year 6-8 Year 7-8 Year L ( 12-18 Months) M (6-12 Months) S ( 0-6 Months)