This is from the free Burdastyle pattern, made in polar fleece. They go all the way up to my elbows and I can comfortably type and use my sewing machine with them on! I've tried some of the crocheted wristwarmer patterns before but like these much better because of the close fit.
I altered the pattern a bit so that I can cut them flat, not on the fold. This makes it easier to cut out two at the same time ensuring you have a correct left and right piece. I also added an extra quarter inch seam allowance. The thumbs are a bit fiddly to stitch in but other than that these are really easy and quick to make.