My 2 year old daughter normally wears 2T pants and 3T shirts. I ordered her a 2/3 and it was VERY Small. It didnt even cover her little belly. I returned it for a 4. The swimsuit itself is very nice and she loves it!!

I have an average-sized 6 1/2-year-old and because of the reviews that said it runs small, I got a 7/8. The top fits great, not too large at all, but the bottoms are huge on her, to the point where they are falling off. So I just ordered a 5/6 so I can use the bottoms from that size and the 7/8 top. It is a very cute suit and my daughter loves it, but they need to fix their sizing.

My daughter is 3. Her waist is 23.5 inches. The band that goes around the suit bottoms was way too tight! Other than that, we loved it. It is beautiful!