I purchased these for my niece. She is 2 years old and loves crocs! They are easy for her to put on. My sister called a couple of months after I gave them to her and asked me were I had purchased these crocs. I said Amazon. She explained that she was out at the park with my niece and she was complaining about one of her feet hurting. My sister removed the shoes to sees if there was stone or something agitating her foot. She also noticed that my neice had developed a blister on her left foot. Looking at the shoe and finding nothing wrong with them she turned them over and noticed that the right shoe showed "US 6-7" stamped on the bottom but the left shoe showed nothing on the bottom. I also noticed that when I received these from Amazon they were not tied together with plastic or tags like Crocs that are purchased at the store?  She has moved on larger Crocs as she has grown and we still love their products however would not recommend purchasing unless they are from an Official Crocs store.