Another option: All of these materials, including the Pattern, come in our Simple Hand Warmers + Hat Kit.
20 stitches = 4 inches in garter stitch
Adult Small/Medium (Medium/ Large)
Finished Circumference: 5 3/4 (6 3/4) inches, comfortably stretching to about 8 (9½) inches
Finished Length: 8 (9) inches
Finished Circumference: 17 inches, comfortably stretching to about 24 inches
Finished Height: 10 1/2 inches, uncuffed