Arm Circumference
Your flexed arms should be 150% larger than the circumference of your non-dominant wrist (wrist circumference x 2.5).
To measure your wrist, find the bony lump on the outside (the styloid process), open your hand, and wrap a tape measure around the space between that lump and your hand.
To measure your flexed arms, wrap the tape around the largest part of them (the peak of your biceps and middle of your triceps).
Calf Circumference
Your flexed calves should match your flexed arms.
To measure your flexed calf, raise your heel, press your toes into the floor, and wrap a measuring tape around the largest part of the muscle.
Forearm Circumference
Your flexed forearms should be 100% larger than the circumference of your non-dominant wrist (wrist circumference x 2).
To measure your flexed forearm, wrap the tape around the largest part of them while flexing them away from your body.
Shoulder Circumference
Your shoulder circumference should measure 1.618 times larger than your waist (waist circumference x 1.618).
This produces the coveted V-taper that research has proven to be attractive to women.
To measure your waist circumference, circle your waist with a measuring tape at your natural waistline, which is above your belly button and below your rib cage. Don’t suck in your stomach.
To measure your shoulder circumference, stand upright with your arms at your sides (no flaring your elbows or spreading your lats), and have someone wrap a tape around your shoulders and chest at its widest point, usually near the top of your armpits.
Chest Circumference
Your chest circumference should be 550% larger than the circumference of your non-dominant wrist (wrist circumference x 6.5).
To measure your chest circumference, stand upright with your arms at your sides (again, no flaring your elbows or spreading your lats), and have someone wrap a measuring tape around the fullest part of your pecs, under your armpits, and across your shoulder blades.
Then, take a regular breath (don’t overly expand or deflate your chest) and note the result.
Upper Leg Circumference
Your upper leg circumference should be 75% larger than your knee circumference (knee circumference x 1.75).
Measure your knee circumference by straightening your leg and wrapping a tape around the middle of your kneecap.
For upper leg circumference, flex your thigh and hamstring, and measure the widest part of your upper leg.