i live in america and measure at home at 168.5. i go to vietnam and my doctor office i measure at 165. im not sure what to say. i remeasure at home a few times before too. can it be that im wrong some says my doctor office is off too. also on a youtube that i watched heightincreaseinfo they are saying their patients are this height but from a birds eye view i can tell they arent that height but even taller. they have been mismeasuring their patient height for sure. any body notice this or is it just me?