Measure a person’s height with iPad
On iPad Pro 11-inch (2nd generation and later) and iPad Pro 12.9-inch (4th generation and later), you can use the Measure app to instantly measure a person’s height from the floor to the top of their head, hair, or hat. (You can even measure the seated height of a person in a chair.)

Position iPad so that the person you want to measure appears on the screen from head to toe.
A line appears at the top of the person’s head (or hair, or hat), with the height measurement showing just below the line.
To take a photo of the measurement, tap
.
To save the photo, tap the screenshot in the lower-left corner, tap Done, then choose Save to Photos or Save to Files.
You can easily access and share the height measurement image from Photos or Files on iPad whenever you want.
To take the measurement again, turn iPad away for a moment to reset the height.