Slumber 1 8-inch Mattress-in-a-Box: Tight top bed mattress with individual spring coils Revolutionary rebound technology lets the mattress-in-a-box expand in minutes when unpacked Increased motion separation: springs provide undistributed rest Slumber 1 spring mattress is constructed to adjust individually to your weight and body shape Heavier gauge steel coil for durability and comfort with the Slumber 1 Mattress-in-a-Box Twin Dimensions: 75 x 39 x 8 Full Dimensions:75 x 54 x 8 Queen Dimensions: 80 x 60 x 8 King Dimensions: 80 x 76 x 8 Also available: Smart Base Steel Bed Frame in Twin/Full and Queen/KingBeds sold separately. See our assortment of beds. Bed frames sold separately. See our assortment of bed frames. Great for platform beds. Requires foundation or box spring with standard bed frames. Foundations sold separately. See our assortment of foundations.10 year limited warranty.