Gallery Card - Dimensions & Aspect ratio



I can’t find ANYWHERE details about the Gallery Card images’ dimensions & aspect ratio.
Countless experiments with the Cards Validator had left me without any conclusions.

PLEASE share with me the details if you are familiar with them.

Thank you


Hi there,

I am wondering the same thing. Did you get a reply from Twitter on this question?



Unfortunately no


Sorry for the delay.

The file limit is 1MB:

Reading the code, it looks like it’s suggested a 800x800 image. That feels a little large, and there’s other code that says 146x146.

I’d suggest in that range, and the images should appear.

If you’re having other issues, it might be dealing with robots.txt:

If you have other questions, please feel free to ask here.

Sorry again for the delay!