My son is 6 years old and no swimsuit covers his butt. So I decided to try a more form fitting swimsuit. The size is 5/6 times bigger than the tag says 6. And the 7/8 on the tag is actually an 8. They are a bit big, I bought one of those sizes and the 5/6x fit perfectly! My son usually wears dress size 7. The best part is that they don't lie down and cover his butt.
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