Elmo 2T Halloween costume This is an adorable furry costume. The fit is a slim 2T, or as was, in our case, a chunky 24 months. My little guy had a buddah belly, the costume was snug on the belly and a little long on the arms and legs. At the time he was wearing 24 months. In summary, this will fit a slim 2T or a chunky 24 months. You can also read the reviews on Amazon. The material is thick and perfect for cold weather. I think this would double as a snow suit and would have used it again in the snow if my little guy didn't grow so fast. Seriously, my kid is at the top of the growth charts, lol... please buy all of the clothes that he never got to wear 😆 Pet free smoke free home