Accu Fitness Myo-Tape

Model AF-MT05A. Super-accurate measurement of any body part! Track your body measurements and progress as your muscles grow and unwanted fat goes away! Measure any body part - waist, biceps, thigh, calf, chest, and more! Easy to use! Push-button retraction and locking feature ensure snug measurement and superior accuracy. Long-lasting vinyl tape. Measures in inches and cm/mm. Made in China.
Directions

Simple to Use: Pull the end of the tape around any body part that you want to measure (pressing the button in the center will make it easier to pull). Place the rod at the end of the tape into the circular slot. Press the button in the center and let the tape retract to a snug fit. Read your measurement on the outer edge of the tape measure (the end opposite the locked-in rod). Watch your improvement!