I ordered this mattress to replace one that I already had and was worn out. The mattress is nice, but it definitely is not 10 inches thick! I received it on Friday and the package said that it would expand to the full 10 inches within 24 -48 hrs however, it has been almost 5 days later and it only is just under 7 inches thick. I am happy to have a new futon mattress and the price was good. But you definitely need to change the advertisement to a 7inch mattress.