These mitts are knit at an angle with increases that eventually form a rectangular shape (really more of a rhombus to be precise). The rectangle is sewn together at the shorter sides, leaving an opening for the thumb. After the rectangle is sewn into a cylinder, stitches are picked up at the bottom and worked in the round in a (k2, p2) rib. Stitches are picked up for the thumb and also worked in the round.