Bed height does not impact sleep quality. However, bed height affects your ability to get into and out of bed without issue. Therefore, taller and older sleepers like the added height that bed risers add to their sleep environment. Mattress thickness does impact sleep quality and joint support. Mattresses range in thickness from 8 to 14 inches. How thick of a mattress you need depends on your body size and preferred sleep position. Those planning to share their bed with a partner will want to aim for a thicker mattress.