these could possibly work as dress forms, but the size isn't changeable. casual corner, who is going out of business, has a ton of these. i bought two today for 25$ each. ask around different stores, though, i got quoted different prices at three different stores!
i'm not sure. i imagine a 4 or 6....i am neither, but it is nice for draping anyhow...(but i am actually going to use them for decoration, and not for sewing -- i have another dress form for that)