@leocg Eureka. The three line button in the upper right corner gives an option for 'Speed Dials Size and Shortcuts' which when enabled changes the speed dial from five thumbnails/row to four larger thumbnails/row.

Is there a way to change the size of the thumbnails in Speed Dial on Android?
In my case I need to increased the size.
I can't find any way to do this in Settings.

Android 13
Google Pixel 6a
Opera v77.2.4095.74586