30 inches
The average height of a 7-month-old baby is around 25-26 inches.
Probably 5-11 pounds.
182cm
Of course, the height of a 9 month old baby can vary. However, the average is usually 30-33 inches in height.
700 ft.
6 feet
300 kg
There really isn't an average height for a 16 month old boy. They vary in heights, and you should not be concerned about his height. Boys usually grow majorly and importantly at 13 anyways. :)
15 to 21 inches The average height of the newborn baby depends on his or her gender. To compute for your baby's height percentile, you need to mention the birth date, gender and your baby's height, so you can have an accurate findings based on WHO Growth Chart.
the average height should be 26 inches long of 6 months old baby
I looked it up and found that the average weight of a 20 month old is 25.35 pounds. http://www.disabled-world.com/artman/publish/height-weight-teens.shtml
I think about 75 cm, if you look at the mid line in your red book.