Youtube, Help! How big should the bckground image be?

[NipoudgrfD]

HEY!, in youtube, on my channel, i want to put a background foto the right size, so that the foto doesnt have to repeat.
How much should the foto ocupy?
Ive tried 1277 x 1429 , but not big enough

5 STARS BEST ANSWER
!! xooxxoxoxxoxo ^^thankss

 

[Euryale]

mine is 1024 x 728 (which is the standard size of most screens.

http://www.youtube.com/lorancamusic