Using size 7 needles and worsted weight yarn (I used Vanna's Choice from Lion Brand for these), cast on 34 stitches.
R1 – R8: 2 x 2 ribbing
R9 – R36: Stockinette stitch
R37 – R38: 1 x 1 ribbing
Seam sides, leaving a hole about halfway up for the thumb.