I bought this a few years ago. The hidden animal is cute, and you can see the whole thing when you unbutton it. It's a free size, but I think it's equivalent to a size M. It's a flannel shirt, but it's thin. There's no tag, but I only tried it on and never wore it, so I've kept it in storage. Size (flat measurement) Total length 66cm / Length 63cm / Shoulder width 45cm / Body width 51cm / Hem width 53cm / Sleeve length 52cm