|Wide/HD 16:9||Wide 16:10||Older 4:3||Phone||Tablet|
Some examples of aspect ratios:
Wide/HD/16:9 - 1024×576, 1152×648, 1280×720, 1366x768, 1600×900, 1920×1080, 2560×1440
Wide 16:10 - 1280x800, 1440×900, 1680x1050, 1920×1200
Old TV 4:3 - 640x480, 1024x768, 1280x1024, 1440x1152 etc.
The size shown in italics above is the actual image size that I've linked to, but as long as you pick the right ratio it will look GREAT on your monitor using "Stretch" or "Fit to screen" as your option when you set an image as your wallpaper.
Click on the link to the image of your choice to see the full size version, then right-click on it (one-button Macs, use CONTROL-Click).and select "Set as Desktop Background".(Firefox) / "Set As Background" (Explorer) - This also saves the image to your computer. Using Firefox, it will usually look best if you use the options "Stretch" and a black background, like this:
The easy right-click desktop wallpaper method works with Safari, Explorer and Firefox. Many versions of the Chrome browser make it a little harder: Right-click and select "Save image as..." Remember where you saved the file. Then go to your desktop, right-click, select the "Desktop" tab, click "Browse" and navigate to the place where you saved this file. Select the file and click OK.
Any problems or questions? Leave a comment and we'll see if we can work it out. Or visit me on Twitter or Facebook.