Those black velvet ones are hot, me want.
looking at it... it has that seam on the side. I don't know how to sew at all, but if I had to wing it, I'd get some sort of very thin black elastic thread ...sew it together and gather it a bit...it doesn't seem too hard, you just have to sew carefully. The people at the fabric store can probably help you find appropriate thread. I've seen thread like that at bead stores.
Edit: Yeah, what Haley said...
and Suze.