Below are some of the standard animated gif banner sizes used on web pages. It is a sort of convention to develop banners based on these sizes; however, you are not bound by these dimensions, as it were. Two other sizes for animated gif banners are also in use: 350×300 and 720×300. These are generally not used on web pages but as pop-up or pop-under ads displayed in separate browser windows.
The standard sizes for banners have been formulated by the Interactive Advertising Bureau.
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The other two common banner sizes are:
- Leaderboard – 728 X 90 pixels : Click to view sample
- Half page ad – 300 X 600 pixels : Click to view sample
