This is a set of four items: a romper and fluffy socks, purchased for a birthday, etc. The navy romper is fleece-lined. I forgot the sock size, but the length from toe to heel when laid flat was 9cm, so I think it's 9-13cm. Both rompers were worn less than 5 times. I feel like the socks were worn quite a bit, and there's a feeling of use on the underside, but they're fluffy, so I don't think it's very noticeable when worn.