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King Size Box Springs

A king box spring, measuring 76" x 80", is a mattress foundation that bolsters your king mattress by providing both extra support and height to your bed. A king size box spring is a nest of springs surrounded by wood and covered in fabric. This specific design not only adds extra inches to your bed height but also provides additional stability. Pair your king mattress with a king sized mattress foundation to take your sleep to the next level.