This pattern is written for 3 yarn weights: worsted, such as Malabrigo Worsted, light bulky, such as WAK Petite Wool, and bulky, such as Malabrigo Chunky.

Gauge (4” x 4” in stockinette, worked flat with straight needles)
Worsted - with US 7/4.5 mm - 21 stitches X 40 rows
Light Bulky - with US 10/6 mm - 16 stitches X 26 rows
Bulky - with US 11/8 mm - 12 stitches X 22 rows