Website showing TV aspect ratios & screen sizes?

There's a site that does widescreen conversions and aspect ratios for you. Like itf you have a 19" standard (4:3) TV you will need to buy an HDTV that is XXX" to be the same/comparable size. I can't seem to remember what is is called. Any help would be appreciated. Thanks!!!

Anyone??? I know it exists! It had overlapping 4:3 and 16:9 images to show how much smaller a 19" 16:9 monitor would look compared to a 19" 4:3 monitor...

I think I saw something like that on cnet, so maybe you can look on there.

Here it is: http://reviews.cnet.com/4520-7608_7-1016109-4.html

I just googled "4:3 16:9 comparison" and found it. You're a ing disgrace to the internet!

It doesn't have overlapping pictures and shit, but it gets the job done.