Column size - Automatically adjusting to fit content (photos)

Hello everyone!

When we upload photos to columns we need them to stay the same size (because then I send a notification to users and in this notification they have to see these photos), but once I get out of this sheet it gets back to its "normal" size and the photos disappear.

1, When I upload the photo:

2, Once I get out of the sheet, the column size look like this:

I'll be grateful for any advice or idea what to do with this issue.

Best regards,