Measure from the floor to the pencil mark with a measuring tape. Keep the measuring tape flat against the wall. If your measuring tape is too short to measure your full height, measure as high as you can and make a pencil mark on the wall. Note the measurement.
Is morning height your true height?
A persons height changes throughout the day. A person is at their tallest in the morning when they first wake and gradually loses some height throughout the day. There is no best time to measure height.
How do you find the height of a reflected image?
0:384:42Image Distance, Image Height: Convex Mirror EXAMPLE - YouTubeYouTube
Does the height depends on the distance between the person and the mirror?
The man is twice as tall as the distance between points X and Y. In other words, to view an image of yourself in a plane mirror, you will need an amount of mirror equal to one-half of your height. A 6-foot tall man needs 3-feet of mirror (positioned properly) in order to view his entire image.