Serta Perfect Sleeper Stabl-Base Split Queen Low Profile Foundation TWO split foundations need to be purchased to complete the size of the standard foundation queen Provides consistent support and lasting durability to the sleep set Unique construction isolates the impact of your sleep partner's movements Boxspring only, Mattress is purchased separately Dimensions per piece are approximately 80 inches long x 30 inches wide Serta's StabL-Base Boxspring is a perfect match for your new Serta Perfect Sleeper Mattress