The Welch Blog

At Birth: 6 lb 12 oz & 19 inches long (25th/10th percentile)

1 month: 9 lb 7 oz & 21 inches long (50th/25th percentile)

2 months: 12 lb 5 oz & 23.5 inches long (75th/75th percentile)

4 months: 16 lb 6 oz & 25.25 inches long (75th/60th percentile)

6 months: 18 lb 1 oz & 27.25 inches long (70th/75th percentile)

9 months: 19 lb 5 oz & 28.75 inches long (25th/50th percentile)

12 months: 21 lb 7 oz & 30 inches long (25th/60th percentile)

15 months: 23 lb 9 oz & 31.25 inches long (40th/50th percentile)

18 months: 26 lb & 33 inches long (50th/66nd percentile)

2 years: 27 lb 9 oz & 35 inches long (43rd/71st percentile)

3 years: 31 lb 8 oz & 37.75 inches long (50th/50th percentile)

4 years: