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Alex Rivera
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Google +1 button generator implies I need to specify <meta itemprop="image"> for the thumbnail. Documentation page says the following order is respected: Schema.org microdata <img itemprop="image" src="..."></img> Open Graph protocol <meta property="og:image" content="..."/> Neither of three, even combined, worked for me. Google Plus sharer ignores the image of my choice and shows a different image instead. This is not a caching issue, as I have changed subdomains a couple of times just to check. It looks like Google +Snippet prefers larger square images . I'm building an extensible engine so I need to know the requirements for sure. What is the minimum size for a Google+ thumbnail? Does it have to be square, or how close to square does it have to be?
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