Handwarmers are knitted in the round, but the cuffs could be knitted flat then seamed together. The thumb opening is marked as you knit, and finished afterwards (an afterthought thumb).
The photographed handwarmers were knitted with Shetland Organic yarn but any of the suggested yarns could be used. These are ideal project for using up small amounts of yarn.
Use smaller or larger needles to get smaller or larger handwarmers.
The handwarmers were used in the blocking section of "50 Tips from Shetland Knitters".