This king size wood foundation is designed to work best with latex foam mattresses, memory foam mattresses and polyfoam mattresses. It can be used on standard spring type mattresses as well. It measures 75 1/2" x 79" and fits all standard (eastern) king size mattresses. Unlike most boxsprings this king size wood foundation assembles as one piece not two. We pre-assemble each and every foundation to assure proper alignment and then disassemble it for shipping purposes. Assembly is easy and is explaned on the home page for this product.