The price ($724.26) is same for any size. Twin, Full, Queen, King or Cal King and the mattress and the box spring is free.
After you apply the coupon 44FORYOU price drops to 724.26 + Tax. Includes shipping.
http://www.jcpenney.com/p/signature-design-by-ashley-rudolph-bedroom-package-free-sierra-sleep-plush-mattress-set/ppr5007268993?pTmplType=regular&fromBag=true&selectedSKUId=79056390018&commerceId=ci73301029019&selectedLotId=7905639&fromName=false&catId=Bag&quantity=1&ppId=ppr5007268993