We bought the swimsuit for the first (and certainly not last) Babyschwimmen our baby. In other reviews was advised to buy one size larger than what we did. She was unfortunately a little too big at the beginning, but the meantime, it fits like a glove and our baby has a lot of fun while swimming. It keeps very well tight and looks totally cute. An eye-catcher is all and fulfills its function so far to 100%.