The standard height of a box spring is 9 inches, but box springs can range from 4 to 10 inches thick. Box springs accommodate innerspring mattresses, and in today's market, these have an average thickness of 8 to 14 inches.
Additional bedroom items such as mattress toppers will also add to your bed's overall height. Ideally, your mattress should be about 25 inches from the floor, so you can get in and out of bed comfortably.