How thick is the average mattress? The average thickness of mattresses ranges between 8 to 14 inches. The best mattress should have a comfort layer that's at least 2-3 inches thick and a base layer that's at least 6-8 inches thick. Most mattresses also contain a 1-2 inch thick transition layer.Dec 1, 2021
How thick is the average full mattress?
Full: Full mattress thickness can vary between 5 inches to over 20 inches in thickness. Queen: Mattress thickness can go anywhere from 5 inches to over 20 inches thick. King: Mattress thickness is often between 5 inches to over 20 inches thick.