Frank its a regular full sized futon that I bought(was about $300 but so much more comfortable then the existing cushions). I made a cover for it and picked up a 3/4" sheet of plywood cut it to the size of the table then lopped off 2 feet. I got a piece of foam off craigslist to make the 2 square cushions to get the wrap around couch look. I wanted to be able to have seating for a few people inside.
At night I move the throw pillows and the 2 side cushions and pull out the 2 foot piece of plywood and the board that ParkLiner
included to get the queen sized bed width and just pull the futon forward it drops down into a bed. In the morning I slide it back pull the sheets off and put the cushions back in place and I have a comfortable couch. Best of both worlds and gives me about 2 more feet inside so it feels larger.