Baby 7 months and 27 inches? normal

50% tile if a boy: If your baby is a boy- this length is at 50%tile meaning 50% of children this age are larger, 50% smaller. If your baby is a girl, this length is at the 75% tile- meaning she is a bit longer than other children her age. Lengths between 10% to 95% tile are considered normal. Docs also look at weight and head circumference at the same time. Your doc will look at growth trends at each well check.