I had got this made for Bailey but when we got it in we thought it would be more suitable for a girl instead of a boy (just our opinion though) It even has inside lining which I think could be reversible (but no D ring) Bailey has a 6'' neck and is about 10'' around give or take so I would say this harness is an X-Small/Small....I'm only selling it for what I paid $12 and thats including shipping or will consider offers. Please PM me if interested. We would have loved to keep it but oh well....