I got the 6-12 month size for a baby gift. Now that my kid is 20 months old and not really wearing soft soled shoes anymore, they fit. I'd equate them to a toddler size 5. I was impressed with the softness and quality and price so I got another pair as a baby gift- the 0-6 month size is only a centimeter smaller. Probably still a toddler size 4-5.