The Dutch striker becomes the latest in a long line of big names to leave the Gunners, but revealed that the prospect of joining United was too good to turn down.
"Everyone knows by now that I'm a lover of football. I'm quite principled in that prospect. It's always difficult to find a perfect match but I do feel this is the perfect match for me," said van Persie.
"Manchester United breathe football. If you look at all players at the club, the stadium and the manager, my choice was made based on those things."