How do you increase wrist size?

Get at rope tie one end to your weight setting then tie the other end to a 3 - 4 ft pole shaped piece of wood that can hold lots of weight and roll up your rope around the pole a bunch of times and boom increased sized wrists after enough working out

Note: the above works even though its written poorly. Get a broom stick, you can screw a screw in about 3/4's of the way or so, tie a rope around it and tie a weight to it. Roll it up with palms up and palms down. Do this a couple time a day as much as you can, you'll see results in under a week.