Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Weird sizing

The sizing says 0-9, which is weird to begin with, but I'd put it at 6-9. There is no way my 4 month old will fit into this. It's a cute costume though. I just wish it had snaps instead of Velcro and was true to it's size. But really, what is 0-9?