I MADE THE SOFA!!!
It was quite hard to make! And I have to add that the measurements for the foam you posted are too large (or the measurements for the fabric is too small..) so I had to re-cut it a bit. Also, the sewing part was sometimes hard to understand when actually doing it yourself, so I just did it a little different (what I felt was right). Well my cat is far too fat for this sofa and she hasn't really been on it yet, but she is looking, sniffing and walking around it. She almost got seated and when I ran to get my camera she was gone. Oh well, maybe tomorrow, she's having a bad day anyway (scratching all the time, running like crazy..) My the way, cutting foam is so horrible! My hands felt dead after doing that. But it was still fun to make.
Thanks for the tutorial!!! Really I know it probably took you a long time to make. But see, you have made one person and one cat happy
A pic of my baby.