A good guideline for length is if your inseam is 28″ or under, go with short. 29″ to 32″ go with regular. 33″ to 36″, long. We can customize to any length if it is necessary. If reducing the weight of the saddle is very important to you, on the “Slim” fenders we offer the option of leather reinforced Nylon strapping and one pin buckle behind the fender..