Widths and Lengths of Conventional Residential Bedding Products

Furniture and bedding products will fit mattresses according to the table provided below

*ISPA Dimension Standard 

Conventional Bedding	Finished Mattress (+/- 1/2")	Innerspring Unit Construction for Mattress (+/- 1/4")	Molded Foam Core For Mattress	Urethane Core for Mattress (+/- 1/2", - 0)	Finished Foundation (+/- 1/2", - 0)	Wood Frame for Foundation (+/- 1/2", - 0)	Steel Unit Construction for Foundation (+/- 1/2", - 0)
Twin extra long	38 x 79-1/2	36-1/2 x 78	38-1/2 x 81	39 x 80	37-1/2 x 79	37-1/2 x 79	37 x 78-1/2
Queen	60 x 79-1/2	58-1/2 x 78	60-1/2 x 81	60 x 80	52-1/2 x 79	52-1/2 x 79	59 x 78-1/2
King	76 x 79-1/2	74-1/2 x 78	76-3/4 x 81	76 x 80	37-1/2 x 79 (2 required)	37-1/2 x 79 (2 required)	37 x 78-1/2 (2 required)
Split Cal King	72 x 83-1/2	70-1/2 x 82	72-3/4 x 85	72 x 84	35-1/2 x 83 (2 required)	35-1/2 x 83 (2 required)	35 x 83-1/2 (2 required)