It fit perfectly in our full sized bed frame after some finagling. It’s SO comfortable. It’s the best bed I’ve ever owned is not too firm at all. It could have been more plush, but I digress. Buy this and you won’t be disappointed!

I know these box beds usually don’t expand to the full dimensions they say, so I got a 9 inch expecting it to only expand to 8 inches. That’s exactly what happened. But it could have been because we didn’t wait the whole 48 hours. I’m fine with 8 inches though, that’s why I got 9.