Images size vary in widget

First of all let me just say that I love this plugin! I’ve tried different Flickr widgets and none have been as versatile as this one! Thank you for a great product! ??

I have an issue with my widget though. Every time I load my page the widget loads different sized tiles. Most of the time they’re tiny and sometimes they’re large.

Is there a way to have them come up as the size that I want them, say 40 x 40? I’ve tried messing around with the CSS but to no avail. Also I’d like to add a 5px padding between all the tiles. When I add it to the CSS it adds it to my entire menu and not just to the tiles. Is there a way to do this in the settings?

For an example of what I’m talking about please visit https://www.hellenicministries.com and hover over the NEWS tab in the menu.

https://www.ads-software.com/plugins/alpine-photo-tile-for-flickr/