I use the metadatas of The Open Graph protocol for sharing social networks, especially Facebook.
<meta property="og:image" content="http://example.com/ogp.jpg" />
<meta property="og:image:secure_url" content="https://secure.example.com/ogp.jpg" />
<meta property="og:image:type" content="image/jpeg" />
<meta property="og:image:width" content="400" />
<meta property="og:image:height" content="300" />
Until then I do not set the size of the property="og:image:height"
image, but in the Facebook Debugger says that it is recommended to set the image size. Do you have any idea what the ideal size is for this image? Is there any documentation that explains?