about the wingspan I do not know. the paper I used to fold them had one edgelength of 1,5 cm, so the wingspan was a bit smaler ^^
I used to fold them everywhere when i was on my way or waiting for something. everytime i had idle fingers ^^
I bought such a block notice-paper and had everytime so up to 16 papers with me.
I even got that tick to write down my mobilnumber an left them (more or less hidden) somewhere for others to find it
so I gues i am already close to that 1000 from the legend