The industry standard mattress size for an Eastern King size bed 76 x 80. Putting an 80 inch long eastern king mattress on two regular 75 inch twin box springs really does not work correctly.
Instant King Twin Bed Bridge. There's no reason to buy a costly king size bed, when you can simply convert two twins to meet your needs. Made of soft and supportive hypo-allergenic polyurethane foam, this bed bridge bridges the gap, leaving no ridges or lumps.
Fun Fact: If you put two Twin XL beds together, you'll get the same dimensions as a King bed. The Twin XL is the same width as a Standard Twin that you might be familiar with, but it's 5â€³ of additional length make it the same length as a King.
Make 1 King Size Bed with two Twin Size Beds. Place the Bed Connect over the seam between the mattresses. Make one larger bed out of two when you need it .