This is a fluffy, fleece-material kigurumi vest. I dressed my child in it for a pre-school Halloween event when they were 2 years old, and it was a bit big. After that, the COVID-19 pandemic hit, and we never got to go to Disney, so this was only worn once. Because the fabric doesn't stretch, it might feel small depending on what you wear underneath. It's a matter of preference, but I personally recommend purchasing a size up. My child is a bit tall, so I think it would fit a child aged 3-5 years old, but this is just my personal opinion, so please take it as a reference. It's thick, so I will lightly compress it and ship it via Rakuraku Mercari Bin, size 60. It's in good condition, but please understand that it is a used item before considering a purchase.