You will agree that the circumference of the baby's head is something new to any mommy. Usually, when you go with a baby on a monthly visit to a doctor, the babies head is measured. Which is great! But here you will have a tip, which will be useful when buying baby hats or keep track of the size of your baby during the first year of life. And do not forget that our kits ( in the shop) have gorgeous hats that will be customized exactly for your baby. Head sizes are in centimeters.