Do two twin beds make a king?

Since twin bed mattresses measure 38 inches wide -- exactly half the width of a standard king-size mattress -- you won’t need special size sheets, just a set of king-size sheets to cover the two mattresses and a converter kit to keep your house guests from sliding through the middle of the beds and onto the floor. read more

A king sheet or comforter works a bit better for covering two combined twin beds. A king mattress is 76 inches wide, which is just two inches more narrow than two combined twin mattresses. However, like the queen, the king is going to have an extra six inches of length. read more