I had size 8 needles (2 sizes smaller than what it called for) and the yarn fit the needles so I increased the cast on by about 10% roughly and started knitting. It was knit from the top down so I made sure the # of stitches did what it was supposed to do and kept knitting.
It was an easy stockinette/reverse stockinette stitch pattern with the increases coming every 2 sections. And because of the smaller needles/smaller yarn, I added a couple of sections until I got this:
Oh, yeah, I also did an i-cord bind off to make sure it was a pretty edge and that it would bunch up.