I was concerned about the sizes of other comments I read. I ordered size 4-6, small and a bit big for the arm length but it's very soft. She can still wear it comfortably and has room to grow. She is four years old and wears 5/6 in toddlers. Hope that helps! I don't write many reviews but thought it would be helpful because I wasn't 100% sure about the purchase. I can't wait to wear them to ballet! It's always best to buy a short-sleeved leotard with something like this so you can take it off once she starts dancing. If that helps, my daughter weighs about 39 pounds.
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