My 4 year old is tall and slim, so we always have a hard time finding swimsuits to fit her (and pants, but thats a whole different conversation). This suit is perfect! I typically have to buy her 3t swimsuits in order to fit the bottom, but then the top is too short! I ordered her a 4 in this one and its perfect! Were using it for her swim lessons and are very happy with our purchase. Ill be purchasing more patterns/colors in the near future.