A standard king mattress measures around 76 inches wide and 80 inches long. It offers spacious comfort for couples or anyone who wants extra room.

Weight varies by model and materials, but most king‑size mattresses weigh between 90 and 140 pounds. Construction details like coil count and foam layers can increase or reduce the overall weight.

High‑quality memory foam mattresses gently conform to your body, reducing motion transfer and relieving pressure points for a more comfortable night’s sleep. They can be a great option for back support when you choose the right firmness.

A well‑made memory foam mattress typically lasts about eight to ten years with proper care. Rotating your mattress and using a protective cover can help it stay comfortable longer.