Six sizes (approximate finished circumference of 15, 17 1/2, 20, 22 1/2, 20, 23 inches) are provided for two different gauges
Gauges:
16 stitches and 18 rows in 2 inches over two-color stockinette stitch worked in the round on larger needles
or
20 stitches and 22 rows in 2 inches over two-color stockinette stitch worked in the round on larger needles