What size box springs do you need for a king bed?
King — A king-size box spring is 76 x 80 inches.
Does 2 twins make a king?
If you chose to combine two twin size mattresses, you'd have a bed that is neither here nor there; not quite the size of a king bed but pretty close. The width of two twins is the same as the width of a king sized bed, but your new creation will be five inches shorter than a traditional king.
Can you put a mattress on two box springs?
You should not stack two box springs to make a bed higher because box springs are quite expensive. Furthermore, adding that much extra height to your bed may make it difficult for you to get in and out.
Do 2 singles make a king?
The King Mattress is essentially the width of two singles, yet longer. A King is also available as a split king (two long singles) when seperate feels are required (firm, medium, plush) or partner disturbance needs to be minimised.