Weight is the best gauge for newborn,
infant, and toddler sizes unless
the baby is unusually long & thin.

Infant clothing is designed with plenty
of room for a diaper while toddler clothing
provides a little less.

Height is the best gauge for children sizes.

If you do not know the weight & height of the
child a good rule of thumb for the majority of
American children is to take the child’s age
& double it. For example: a 2 month baby
would be in 3 – 6 months; a 4 month baby
would be in 6 – 9 months; a 6 month baby
would be in 12 months; and a 12 month
baby would be in 24 months or 2T.

Once the child reaches the toddler & children
size range the difference between age &
clothing size is less drastic. Moving up
one to two sizes is all that is necessary.