Elbow Measurement Bend your elbow 90 degrees. You want to take the measurement of the width of the widest part of the bone at your elbow. Simply use your middle finger and thumb to get an estimate, and then check this estimate with a ruler/measuring tape.Click to see full answer. Similarly, you may ask, how do I know my frame size?Approximate your frame size by wrapping your fingers around your wrist. If your thumb and index finger overlap, you likely have a small frame. If the two meet, your frame size is probably medium and you are large boned if they do not meet.Also, how do you know if you are big boned? Big boned means wider bones Measure your wrist to find out if you’re really big boned, since “body frame size is determined by a person’s wrist circumference in relation to height,” according to the National Institutes of Health. More than 5 feet 5 inches tall and wrist size larger than 7.5 inches. In this way, how do you measure an elbow? Measure the width between your thumb and forefinger with a ruler. Try your best to keep your thumb and forefinger in the same position, and slide them off of your elbow. Hold a ruler between them, or rest them on a ruler placed on a desktop. Record the measurement as accurately as you can.How much should a medium framed woman weigh?Based on my height of 5’7″ here are the ideal ranges for me as a healthy female according to this body weight calculator: Small frame: 126 – 130 pounds. Medium frame: 135 – 139 pounds. Large frame: 144 – 148 pounds.