There is not a requirement for household shower heads to be a specific height, but, in modern construction, they are often placed about 6 feet, 6 inches from the base of the shower. In positioning the head, the size of the users is typically taken into consideration.
The height of all users is important when determining the height of a shower head. This also includes children and individuals who bathe in a seated position. It should be above the head of the tallest person but still reachable by the smallest. Controls for a shower stall are usually placed about 3 feet from the floor of the enclosure. If there is a combined bathtub and shower, the shower knobs are situated 8 to 18 inches above the tub's spout.