My daughter is 6 years old and wears 5T and 6X and I bought 4T-5T and they fit well. By the way, the dress fits perfectly. This dress is the most beautiful dress, beautifully made and incredibly durable. My daughter jumped, crawled, ran, sat and tripped in this dress for hours on her birthday (all outside) and the only thing that happened to the dress was chocolate icing appeared on it. So buy this dress, it's amazing!
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