Basic costume to turn a kid into a Ninja. I bought a size small - a little big on the 3.5 year old and almost tight on the 5.5 year old (although in both cases it was over their clothes). Decent quality - GREAT quality for the price - I predited a couple years of playtime wear. Although I will have to convince them that Ninjas don't always wear those ties just so I don't have to keep tieing them!