My youngest is 11 months and walking and I have her in the soft slipper ones, I have a toddler pair on the way for her but I won't put her in them until she is capable of wearing them properly. My other girls wore the soft soled slippers for 6 months or so but my youngest is quite a capable walker so I have bought her some earlier then I would usually suggest (she most likely won't wear them for a couple of months yet).