I ordered the 6-9mo. These are smaller than I was hoping -but I am grateful for the double row of snaps. Lengthwise they are comparable to a Carter's brand 6mo. The colors are vibrant and unique. I am planning to order more as gifts. I would order additional onsies for my son -but he is only 2mo old and already seems to have maxed out the Disney sizing. :( Great VALUE though!