Moomin-designed fleece sleeper, warm and cute! - Design: Moomin character print - Material: Fleece There's no size listed, but my child wore it around 1-2 years old. I think a 3-year-old could wear it as an outer garment! It fastens with Velcro, so it's safe. Because it's easy for children to put on themselves, it fulfills the "I want to do it myself!" phase. It's not too thick, so it's comfortable to wear even in a room warmed by air conditioning. This is a used item, so please refrain from purchasing if you are concerned about that.