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Muhammad Rehan Saeed
Muhammad Rehan Saeed

Reputation: 38477

Atom 1.0 Syndication Feed Icon and Logo Sizes

The Atom 1.0 specification has the following lines about the icon and logo elements in the feed:

icon - The image SHOULD have an aspect ratio of one (horizontal) to one (vertical) and SHOULD be suitable for presentation at a small size.

logo - The image SHOULD have an aspect ratio of 2 (horizontal) to 1 (vertical).

What is the reccomended size for the icon and logo images that can be used by most Atom feed readers?

Upvotes: 3

Views: 2217

Answers (1)

Jochen van Wylick
Jochen van Wylick

Reputation: 5401

I found a blog post discussing just your question http://snook.ca/archives/rss/add_logo_to_feed/:

The Atom specification details two separate XML elements that can contain a URL to an image: icon and logo. For icon, it indicates that the image should have a 1:1 ratio and should be appropriate for small sizes. Not much more is spelled out, such as appropriate image types.

... And further on ...

Now, the RSS specification is a little more specific when it comes to possible image sizes.

Maximum value for width is 144, default value is 88. Maximum value for height is 400, default value is 31.

Since feed readers will probably both show ATOM and RSS feeds, this is the ballpark image size they're expecting. So I checked out the FlickR ATOM feed ( http://api.flickr.com/services/feeds/groups_discuss.gne?id=34427469792@N01&lang=en-us&format=atom), that uses a 48px square icon. Maybe you could stick to that for you icon. It doesn't supply a logo though.

Upvotes: 3

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