What maximum sofa width would you recommend?

Dimensions: Red approx. 355cm (measured from the inner edge of the tile base), Yellow 175cm

I want to point out that either your measurements or the drawing is incorrect. At 3.55, the stair wall is a maximum of 120 long. But since you haven't been online since yesterday, you no longer care about this and other opinions?

I might be an oddball. But most of the time I’m sitting or lying on the couch... and not standing in front of it to admire how beautifully it fits into the room and how decorative the 50cm of free space on the left and right are, which could have been used for more seating area.

But having the audacity to be offline here for 2 days is really something else. Shame on you!

PS:
Well, I have 2 kids, so function sometimes takes precedence over interior design. Not everyone understands that.

I might be an oddball. But most of the time I sit or lie on the couch... and I’m not standing in front of it to admire how nicely it fits into the room and how decorative the 50cm of free space on the left and right are, which could have been used for more seating area. But having the audacity not to be online here for 2 days is really something. Shame on you! PS: Well, I have 2 kids, so sometimes function takes precedence over interior design. Not everyone understands that.

Your behaviors don’t matter at all anyway, as so often … !

Your behavior doesn't matter at all, as is often the case … !

At least he now realizes that he is an oddball. I can say from my own experience with certainty that having 2 children does not automatically mean that one would try to squeeze their sofa with a 2cm gap into a room. We do not plan to do that.

At least he now realizes that he is a weirdo.
From my own experience, I can definitely say that having 2 children does not automatically mean you would squeeze your sofa into a room with a 2cm gap. We do not plan to do that.

Or you want to raise your children to be sofa hunchers.
There was once a floor plan discussion here, where OP absolutely wanted to have 1.5 meters behind the sofa so that his child could playfully circle around the sofa like he did back then.

Or you want to raise your children to be couch potatoes.
There was once a floor plan discussion here, where OP absolutely wanted 1.5 meters behind the sofa so that his child could playfully walk around the sofa like he did when he was younger.

Admittedly, we also used to have about 1 meter between the sofa and the wall, and this passage, which was only open on one side, was extensively played in by us children. You could hide there, build a cave out of pillows and blankets... that has something special.