technically, any size, it depends on the end user. someone could view it at 640*400 while another could view it at 2048*1536 design a layout with 800*600 through 1600*1200 oin mind as this is what vast majority of people use. if you insist on a single size, 1024*768 and 1280*1024 are the two most common resultions currently
Design it 600 wide and what ever you want long. There are java scripts that will strech it to fit the window of who ever is viewing the page, google to left, to right and you might find something, i have never tried it nor have ilooked for it but 600x800 i belive is the standard size and there are scripts to streach things.
itll look different on every1's screen depending on their size, and resolution pick any size, make it transparent, and just add a html background
and html background? never seen one of those.// make what transparent? if you make an image have a transparent bg, it'll be effed up for IE users.
If by "guy above" you mean me your correct, i don't have myspace, i was just using knowledge of other sites to try and help which i belive i did do....
lol yeah gues your right but html back ground: uploading the pick and using html codes to make it your bg, and itll fit the screen, if you use something like dreamweaver