Youtube user CRB­pa­per­pla­nes presents probably the best paper airplane in the world, at least agree the proportions and flight demonstration also knows to convince:

This plane is de­ve­l­o­ped 100% by me. About ten years ago, we had a com­pe­ti­ti­on with my bro­ther, who can de­sign bet­ter paper plane. We had very sim­ple rules. We could use one sheet of A4 copy paper, and scis­sors. We lived in a very windy place, on the 6th floor, so the pla­nes had to be able to fly under any cir­cum­stan­ces. This was my best plane.

In this Video I’m try­ing to show that it flies well, in­de­pen­dent from the wea­ther con­di­ti­ons, and the way of thro­wing, and I also show, how to make it.

…AND YES, I PI­CKED UP ALL THE PLA­NES THAT I USED IN THE VIDEO! ! ! ! ! ! ! ! ! :)

Nails