A small frame for men is usually a wrist size of less than 6 ½ inches and a large frame is a measurement over 7 ½. That said theres one situation where you can use bmi to roughly estimate someones body fat percentage. Neck size 79 of head size. For example a 510 200 pound man at 30 body fat would probably have a bmi of roughly 30. In fact muscle mass varies greatly from person to person based largely on physical activity. Arnold schwarzenegger who was 63.
Muscle to bone ratios. I am going to come to that measurements but my weight is never going to be even closer to that. 62 194 pounds max weight 182 pounds max lean body mass. Calf size 192 of ankle size. Chest size 148 of hips size. Currently my measurements are 16 biceps 44 chest 33 waist 22 thighs 145 calves with a weight of 78kg.
Unlike weight muscle mass doesnt have a so called ideal based on your height or even body frame size. Arm size 252 of wrist size. 61 188 pounds max weight 177 pounds max lean body mass. As with marc perrys model berkhams formula lands on the light side. In overweight people with normal levels of muscle mass people who dont lift weights bmi is often similar to their body fat percentage. But how can this put limit of 175 lbs since muscle weight is pretty much more.
While this physique would look amazing at 5 to 6 bodyfat its about 15 pounds light at that degree of leanness. Steve reeves outlined his formula for the ideal body proportions as follows. In his book building the classic physique.