1024X768. Traditional size for many Windows users. Click to enlarge, and right click to save.

1440X900. Fits a 15 inch Macbook Pro perfectly, and possibly other widescreen laptops that have a big resolution. Click to enlarge, and right click to save.

1280X800. Try this if you have a widescreen laptop and are on Windows.

1280X1024.

1680X1050.

1920X1200.