Our 9” Essential mattress is a simpler take on our Original Mattress, utilizing the same dual layer memory foam technology in a slightly thinner, medium-firm mattress profile.Shop Now
One of the largest mattress sizes on the market, king size mattresses measure 76” wide by 80” long. BedInABox® king size mattresses provide plenty of bed for anyone who needs more sleeping space.
How big is a king size mattress?
A standard king size mattress is 76 inches wide by 80 inches long.
Who should sleep on a king mattress?
King mattresses give couples plenty of sleeping space, often enough for the kids or pets to climb in, too.
The king size bed is perfect for most primary bedrooms with 16 more inches of elbow room than the queen size.
Quality comfort, risk-free
Try your king mattress in a box risk-free for 120 nights. If you don’t love your new BedInABox® after sleeping on it for 60 nights, let us know and we will get the return process started. Details can be found in our Return Policy.
Certified king-size support
All of the memory foam we develop for our king size memory foam mattresses is CertiPUR-US® certified. This means that the foam has been tested by accredited labs and has been certified as safe to sleep on. We use multiple layers of our house-made memory foam to provide the perfect balance of support and pressure relief, for all sleepers.
Sleep now, pay later
We partner with Affirm to offer flexible financing options, so you can pay with fixed monthly payments with rates between 0-30% APR. Simply select Affirm at checkout and complete an application that won’t affect your credit score. Prequalify Now.