This is a basic fingerless wrist warmer pattern with a thumb-hole opening. There is no gusset or thumb to be worked after finishing the body of the item. This is a great pattern for learning to knit in the round with DPN (double pointed needles). Because there are no increases or decreases. Just simple ribbing. This is a one size fits most pattern. The natural stretchiness of ribbed knitting makes it adjust for both slightly larger or smaller wrists.