Actually, it's knit on a 16" circular and then dpns. You could do it on straights all the way if you wanted--you'd just have a seam up the back.
Follow the directions for the number of cast on stitches, but you need to knit one row and purl one row in order to get the stockinette.
For the decreases at the top, you can work the decreases the same but with a knit row and a purl row (with purl decreases).
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry