From my friend Laura:
They're vegan Riedell R3s, black, medium width, size 8 (USA?). They've been worn about three times by me, I also have outdoor wheels for them and some nicer indoor ones. I'm a UK size 6 and these fit me wonderfully. I went to roller derby in London a couple of times a few years ago and would have loved to continue but am just too busy with work and stuff. It'd be great to get them to a good home, I also have some knee, elbow and wrist pads - the wrist ones are really fancy ones I think - so could sell them all together possibly.