Two Twin Headboards To Make A King . Stacked and glued wood pieces give this headboard its unique mosaic style. There are written directions, color photos, plus tools and hardware, and cut lists to make sure you're all ready to get building. Create a King TWO Twin Beds Into a Secure Comfortable King from ebay.com Standard dimensions of twin beds are 38 inches wide and 75 inches long. Annie sloan pure white chalk paint, then distressed lightly and waxed with clear wax. An eastern or standard king bed's measurements are 76 inches wide and 80 inches long, while a california king mattress runs 72 inches wide and 84 inches long.