What size shoes does 3 month olds wear?
There is no specific size for a 3 month old baby to wear. Perhaps it is best if you take the baby with you to a baby store in your area and see what size of shoe will fit.
Some babies feet are bigger than others. My oldest was in a size 3 1/2 at 3 months. My youngest was barely fitting into a size 1 at 3 months.