Try it on your wall.
Take a photo of your sofa wall. Mark the sofa so I know how big your room really is. Then I will hang the print on it at true scale. All of it happens in your browser, and your photo goes nowhere.
Start with a photo
For the best result, stand back and shoot straight on, so the whole sofa and the wall above it are in the frame. A photo taken from an angle will make the scale less accurate. On a computer, "Take a photo" opens a file picker.
Mark it, then tell me how wide it is
Tap the top-left corner of the sofa, then the top-right corner.
Pick a size. Drag it where it belongs.
Now put something on it
Use your own photograph
Drop in any photo to see it in the frame, and see whether it holds up at this size.
AI artwork not built yet
Describe it and I make it. This needs decisions that are not made: what it costs, what is not allowed, and how to get an image sharp enough for a big canvas. Until then, use your own photograph.