Know your numbers, reach your goals. Measure progress millimeter-by-millimeter, inch-by-inch with these awesome and easy to use red body fat calipers and BMI tape measurer to get a true read on your health. This set also includes an educational measure UP guide and BMI chart for step-by-step instructions on taking measurements, interpreting results, and tracking progress toward your fitness goals! Calipers have a maximum measurement of 70 mm and BMI tape measurer has a maximum measurement of 60 in.Our body fat calipers are an easy way to measure your body fat percentage. Maximum measurement of 70mm (2.75 in).