From Pattern Notes:

“Wristers are similar to mittens, but without the fingers and thumb. They are perfect for knitting and keyboarding when you have cold hands because they leave the fingers free. These wristers are sized for an average lady. To make a larger size, use size 6 needles (or size required for gauge) for a gauge of 5.5 sts per inch. These wristers have a 3” cuff and also ribbing at the top of the hand so they grip the hands snugly without gapping. They are also knit snugly at a tighter gauge than for most worsted weight items as is done for sock knitting.”

This pattern is available from The Mannings (not free) and includes men’s sizes as well as women’s.