I looked everywhere for a Scooby Doo Costume for my Granddaughter, she loves Scooby Doo! She is 3 1/2 years old and I found this one after reading the reviews. For a Halloween Costume it is made pretty well. It is 1 piece and the sizing is what it says too. I had another one that I had purchased (not from here) and it said for a 3-4 toddler but when she put it on it was more like for a 18 month old she was so sad but then she said Gwamma order one on the computer so I did! This one is exactly as it says. I purchased the child small and it fits her great with a little room to spare. She is 32 pounds and is 39 1/4 inches tall. We received it 2 days after I had ordered it too. Hope this helps you out. It is hard to order something without knowing the true size. I measured as they said to do and they were right! Gotta Love Scooby Doo. I posted 2 pictures for you to see how it fit. She had to wear at on my Birthday!!