A king-size bed frame is designed to support a king-size mattress, which measures 76 inches wide by 80 inches long. This size provides ample space for couples or individuals who enjoy extra room while sleeping. King-size bed frames come in various styles, materials, and designs, allowing for personalization to match bedroom decor. These bed frames typically feature a sturdy construction to ensure durability and stability. Many models include additional support features, such as center support beams or slats, to enhance mattress longevity. King-size bed frames can also accommodate various accessories, like headboards and footboards, for added functionality and aesthetic appeal.