At best, chaps should fit like a second skin, but it is important to measure the right size. This requires the length and width of the calf in order to select the right size within the size charts of the chaps. As most people's calves are slimmer in the morning than in the evening, it is advisable to measure the sizes when you are riding. If you mainly wear riding socks, it is advisable to wear them when measuring. This way, they are included in the measurements and there will be no unpleasant surprises if later the chaps are too tight when riding socks are worn.