average length newborn
The Average Size of Newborns. On the average, the overall length of a newbornâs body is 14 inches to 20 inches or 35.6 centimeters to 50.8 centimeters. In terms of the average weight, a full-term newborn usually measures 7.5 pounds or 3.2 kilograms. However, newborns may still weigh somewhere between 5.5 pounds and 10 pounds or 2.7 kilograms and 4.6 kilograms. Premature babies can even be smaller.