So putting this together was pretty awful. I have a full size mattress/box spring and ordered the "full size" mattress frame. The frame is adjustable to fit either a full or twin but the problem was that on the loosest setting the box spring fell through, but on the next size down, it didn't really fit. I literally had to pry the frame with a hammer to make it JUST wide enough to fit the box spring in. I doubt I will ever be able to get my box spring back out. That being said, once it was all assembled, it looks fabulous and feels very sturdy. Pretty good bargain for the price.