As other reviewers have said they are quite thick. However, the problem for us was not the shoes themselves, but the elastic on the sides. It should be larger or it should go deeper to give more room to insert the foot. Once his leg was in he could walk normally and they fitted perfectly. They looked adorable in his little vest and tie! For disposable shoes like ours, they did a great job. I wouldn't recommend them any more. My son is 2 1/2 and we bought the 8w if that helps.
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