Those could be knit hose in a pattern like the small shepherd's check hose my wife knits. Or they could be cut and sewn from woven cloth (cadadh) which was also rather common in the past.

If you want knit hose, you can commission a knitter (such as my wife). If you want the cadadh, your best bet would be to find some woolen cloth in a pattern you like and experiment with making your own. (I'm sure someone can find some online instructions). You are basically sewing a tube around your foot and leg, and it is important to get a fit that is tight around your calf, but loose enough around your ankle to allow you to get your foot through.

Good luck!