Maximum recommended banner file size

Creator / Banner Advertising Basics / December 8th, 2008 / 2 Comments »

In a previous article we talked about banner standard sizes, one of the most important metrics in banner advertising. Now the second metric in the order of its importance is the file size or file weight. The file size is measured in bytes, often with the kilo- (thousand) or mega- (million) metric prefixes, and it represents the amount of disk space consumed by a particular file.

As with other files, banners (JPGs, GIFs, SWFs etc.) have certain file weights. These files are temporarily downloaded on the users’ computers when they open a web page, so the bigger a banner file is, the heavier and slower to download that web page will be. That made publishers introducing some restrictions regarding the file sizes of the banners they would accept. And that was the first step to introducing a set of universally accepted standards concerning the banner file sizes. There are different advertising networks, and they have different weight standards, here are some of them:

IAB: The recommended initial download maximum file size for all the standard banners is 40 kilobytes (KB), with a few exceptions:

Note that these file weights refer to the initial download. That means, a flash banner can have a total file weight of over 40 KB, but anything above 40 KB is dowloaded “in the background” meanwhile the flash ad/animation had already begun.

AdWords: The file size limit for all image ads is 150 kilobytes.

Aol Advertising: The maximum accepted file size is generally 40 KB for the standard banners, but there are some exceptions. You can read more here.

Right Media - the file size should be up to 37 kb.

If you’re building an advertising campaign and you need some ads, try BannerSnack. It’s a great online tool, and you can use it to make banner ads compatible with all major advertising platforms.

2 Responses to “Maximum recommended banner file size”

  1. Timur Alhimenkov says:

    Great! Thank you very much!
    I always wanted to write in my site something like that. Can I take part of your post to my blog?
    Of course, I will add backlink?

    Sincerely, Timur I.

  2. Jessica says:

    How do I get my banners on bannersnack to be that small? I’ve created several banners and went to download them and they are over 2,000kb and I can’t use that size on any ad network. I seem to have done something wrong.

Add new comment

Your comment