My son is 18 months old and looked adorable in this costume for Halloween. He is 25lbs and 35" and it fit him perfectly.  The only thing he didn't like about it was that it covered his ears, but honestly I don't know how you would design it so it didn't cover his ears.  We live in San Francisco so perfect for a cooler night, would not be ideal for warmer weather. Overall very happy, had a great Halloween!