Not really sure how to answer that. I wear a large leather jacket but the sleeves are a little short. Never tried on a set of chaps, so I don't know what size I would wear, but I wear 34 X 34 jeans. Hope that is what you were asking. And your right, 20 degrees is not fun at all. I only have a half helmet, so I just tied a bandana around my face and tucked in behind the windshield on my Sporty. But I rode in the 20 degree weather for the a young man who died so I have to freedom to go out and ride when I want. And I won't winterize my bike, to much good work still to do this year.