My girl is 5 years old but her waist is so small that sometimes she still wears size 3 or 4 pants. I ordered both 3/4 and 5/6 to check sizes and 5/6 fits perfectly. They're a little loose in the legs, but they fit a lot better than the 3/4 suits that they feel squeeze the legs. The color is fantastic too. It's definitely a BRIGHT neon yellow green, which is what we wanted.
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