I couldn't see past my jacket with mirrors tucked in.
They needed to be 5-6" out beyond the end of my handlebars so that I could see behind me.
These worked best for me.
I had to mount them at the ends of my handlebars, but they were spring loaded so I could easily fold them out of the way to get through doorways.
I fell on them a few times and they didn't break, they just folded out of the way.
View attachment 209249View attachment 209250
I managed to get my Hafny mirrors mounted in the same way, but they wouldn't fold out of the way without undoing the bar bolt every time.
That was a PITA.