There are several methods to accurately measure height: 1, the same measurement time (people’s morning and evening height is different); 2, the same standard height measurement ruler (when measured at home, you can also measure after a piece of paper on the wall, draw a line and then measure the height, but the ruler on the head must be perpendicular to the wall, preferably with a triangle ruler); 3, the same measurer (different people may have differences in the tightness of the calipers when measured); 4, the same standing method of the person being measured (requires two feet together and leaning together, heels, hips, back, head are against the wall, and the head against the wall must pay attention to both eyes flat, not too tilted.