@Shurikid: Yaaaay~ I'm glad
It's my favorite color, so I'm biased lol

It depends on what system you run on, but for me, you can right-click on any empty space on your desktop background (like where the wallpaper is)

Then you can get a drop down list, go to personalize, and there should be an option with "Display Settings" or something like that
And it tells you whats the dimensions you're currently running on

(or, if you have an image editing program, you can PrtScrn and copy+paste it to the program)

Hope I helped?... sorry if none of that made any sense