Due to the inherent differences between the many models of graphics adapters and monitors available today, please be aware that not all viewers of Internet graphics will be able to view all of the colors in your image. Every attempt will be made to create color-accurate images for the Internet ad, but may not be accurately viewable by all visitors. The maximum image size that will be posted is 500 pixels x 500 pixels and a pixel resolution of 72 pixels per inch. Images are limit to this size for technical reasons. While many people have high resolution monitors capable of displaying images several time this size, the goal is to get the complete ad in front of as many potential viewers as possible.
Large images combined with slow modem speeds take time to load.
Also, when a page is printed from within a web browser, only the first 640 pixels, starting at the left edge are printed. Web TV subscribers are working with a screen size of about 550 pixels wide. Anything wider means they have to scroll the image. Scrolling tends to ruin the effect. While it's true that you can display just about anything on the web, you have to keep in mind that most visitors do not have high speed connections, high speed machines, nor monitors capable of generating millions of colors.