The Princess Dream Plush Pillowtop mattress set provides superior softness and resiliency for unsurpassed comfort. Simply the best. Fit for a princess! The mattress measures approximately 12" in thickness. Box spring is approx 8" in height. Kindly leave a phone number so that the shipper can call you before delivering as this is a large item. King size measures 78" width by 80" length. Steal of a deal!