I bought these when my baby was 5 months old and they were huge!  They fit her perfectly this year and she loves them.  They stay on her feet and keep them toasty warm.  My daughter currently wears a size 4 1/2 shoe and the size 3 minnetonka slippers just now fit.  I am happy it happened this way because she needs them more now as a walker than she did as a newborn.  Love Love Love them!