Qn size. Very good condition foam mattress & box spring. REALLY COMFORTABLE! I can also include a new(in box) metal bed frame if needed. Here's a little info about the mattress... The Puffy mattress is 10” thick and comprised of three separate foam layers. For its foundation, the mattress uses a 6″ layer of firm support foam. In the middle is a 2″ layer of what the company calls its “Climate Comfort Foam”. This is a proprietary foam that effectively serves as a transition layer between the dense base layer and the top comfort layer.all three layers of foam in the Puffy mattress are CertiPUR-US certified. This means that they do not contain harmful chemicals, and pass CertiPUR-US standards for foam content, emissions and durability. Specifically, Puffy says the foam in the mattress is made without formaldehyde, ozone depletes, heavy metals, phthalates, and TCEP flame retardants. RETAILS FOR $850-$1,150 Asking $500/BO. Cash. REDUCED TO $400 Pick up in Golden Valley MUST GO!!