King-size mattresses are 80 inches long and 76 inches wide. A king bed gives you plenty of room to sleep with a partner. In comparison to a queen mattress, a king bed has 8 inches more width per person.

What is the size of a king size bed?

King size bed dimensions: 76” x 80”

Room size: A king mattress fits best in a spacious master bedroom, preferably at least 12 x 12 feet. At 76 inches wide and 80 inches long, the king mattress is large enough to accommodate couples who share the bed with their children or a sizable pet (think: a Great Dane).

How big is a king size bed UK?

King (150 x 200cm)

As King size beds are longer than double beds, they're perfect for people who could do with some extra leg room, measuring 150 x 200cm.