Footlength measurement in the neonate.

In 353 neonates, foot length were recorded along with birth weight, crown heel length and head circumference. Foot length correlated well with all three indices (p less than .01). Highest correlation in preterm babies was with crown heel length and weight, and in term babies with head circumference. The formula, length = footlength x 6.5 +/- 20 mm could be correctly used in 95% of babies. When it is difficult to weigh or measure the length accurately, foot length can serve as a useful measurement to assess a baby quickly.