I ordered the medium queen sized mattress. It was easy to install on the bed, once I was able to get the 80 lb thing up the stairs. (Tip: remove the cardboard box. Easier to maneuver and grab onto. Also used a dolly to go up step by step.)

The mattress, however, should be labeled extra firm. It’s like sleeping on a board! I’m hoping that it will soften over time. I am disappointed because it’s nicely made and just the right dimensions (not too tall) for my platform bed, but just not that comfortable. I will update if it turns out to be just a breaking in period that is needed.