We have been buying Crocs for many years, these specific ones have many differences from the classic genuine Crocs. The Crocs have double sizes, these ones have quadruple sizes. Their color is different, they are cheaper, they say "made in Bosnia" while the regular Crocs do not. They are very soft and do not protect the child's foot at all, while the regular Crocs are sturdy. The strap at the back on the authentic Crocs is shorter and more elastic to hold the foot. I returned them immediately as soon as I received and saw them, I didn't even put them on the child. The baby wears size C5, these were C4, C5.
When I called and complained to the store, they told me that Crocs has two series, the single sizes and the double sizes, they probably meant that the double sizes are fake... Beware! The low price is attractive but it's not worth it.