the size runs way too small. I bought a 12-18mth size, my bb is going onto 8mth, she cldn't even fit in it! It's a shame bcos this outfit is really cute n pretty! I realized, after buying a few of Mud Pie's pdts (including socks) their sizes really are too small. I wish I hadn't bought them all at once. :( Then I would have bought the rest at like 3 sizes up. =/