Our King boxspring is made up of two single boxsprings (simulates a split box). Our years of experience as a staging company has shown us that combining two single achieves the same width as a king, fitting any headboard perfectly. Additionally, this setup is about five inches shorter than a full king, providing the advantage of extra space in the bedroom. That’s why we opt for two single bed boxes (when combined with two single mattresses) to create a king bed. Please order TWO single boxsprings to create your order.