Newborns usually have two fontanelles, the anterior fontanelle and the posterior fontanelle. The anterior fontanelle is the one in the front. It's larger, about one to three inches wide ...

[3] The size of the diamond-shaped anterior fontanelle has a wide range of normal, from 1 to 4 cm by 1 to 2.5 cm, and usually closes before 2.5 years of life. The triangular-shaped posterior ...