Frame Size (Elbow) Calculator View Calculator Since bone structure varies in size from person to person, researchers have added frame size as a factor in helping to determine someone's ideal weight. Knowing your frame size can help you set reasonable weight goals. Enter your height and elbow width and this calculator will use standard insurance industry tables to show your frame size and ideal weight range. (Measuring the elbow, rather than the wrist, to determine frame size gives more range and accuracy, particularly for men.) Learn more about putting this calculator or other calculators on your website.