Did you find that from a site where they sell it like that or is it just pictures?

Do you love lolling around on the floor and getting on your hands and knees to get into bed , IMO this is one of those things that looks great but functions poorly, but definately custom and not cheap

Ahhh, to be young again (and not have dust allergies)!

They're called "chair beds" (in this case, a double chair bed). Check them out online.

The photo in the OP isn't one of the chair beds. They are larger cushions, no folding joints, and much thicker than what was in the replies. I agree with the above post noting they are likely custom (head board matches).

if you are trying to fit to a current bed frame, measure the bed height to determine how thick ("tall") it is. Notice where they stop in relation to the bed in the photo. If you're doing from scratch build or buy a lower frame. If your handy with a sewing machine or know so one that is they could easily be made if you source a foam or cushion for the interior. The chairs may be an ok attempt but honestly the smaller cushion segments and the Fabric joint width intended for the folding into a chair will likely not provide the same look.