アップロードされた画像のサイズはいくつですか？

[Moin]

I found this information about the image sizes for badges

@Discourse

Extra details about image size if using an uploaded image:

@Johani

The largest badge image we display is 64x64, so double that for retina displays.

To avoid blurry images, I would recommend 128x128 as a minimum.

This should give you ideal results on all devices.

But I was also able to upload smaller images, they just didn’t look that pretty.