The sizing that most collections have are 3mth, 6mth, 12mth and 18mth. The only one to offer a 9mth is Jean Bourget which might help if the baby is in between 6mth and 12mth.

The collections that are available for this age group are the practically the same as newborn to 3mth old section. Tiny Dee and Absorba will be too small for this age range.