I actually cast on 21 stitches and used 5 stitches for the edges instead of the 7 stitches in the pattern. I used a number 6 needle, and I can't remember what the yarn is called.
I took it to Ravelry knit night at Border's and no one else was sure what it was either. I think it is some cotton rayon blend, with one of the plies being a shiny one and the others more dull. I keep thinking maybe it was called Twist.