Frogged the edge again for the second time and am now knitting a "classic" hem.
2/2 rib, for about 2.5". Cast on 240 stitches on needles US 2 (3mm) and it seems correct! Also decided I will make it a sweater instead of a vest. Are there any more knitters who want to make a sweater? I'm even thinking of putting a lining in, so I can wear it instead of a coat.