This three-arm clothes line's arms are about 150cm long. The tube is 32mm diameter. You will need a ground-embedded mounting to use it to its full extent. We use a standard line nowadays because we haven't got the mounting.
I suppose you could lean it - fully deployed - against the wall, but it might fall over in the wind!
Three-arm clothes line (Fishers Green SG1)
This offer has been gifted to someone and is no longer available.