Am worried about background image

[britain]

hello,

i want to create a background for my website ( not yet started ) and i was going to use an image to make it look better but then i thought about screen resolutions and i was wondering what size i could do it without the quality of the picture being lost

thank you.

[CaptainB]

I've used an image with the width 1350 px. That should fill the whole width of the page on most resolutions.

[mlseim]

If your background is a "repetitive design" instead of one large image,
you could tile that smaller image across and down your screen, so it
wouldn't matter what size it was.

[fl00d]

Also by tiling the image, as mlseim said, it will cut down on image load time.