I ordered a toddler size 6 for my 2 year old son, but unfortunately, the woolly lining inside the Croc made it too small for his feet. Fortunately, I was able to remove the lining (fairly easy process) and use the (now bigger) Croc for my 4 year old son. I would advise getting these for your youngster (order at least one or two sizes bigger than they would ordinarily wear) because after they have grown out of them, you can recycle them and use them again by simply removing the liner. It's like two shoes in one!