[Evolution] Change envelope icon size?

[William Oliver <vendor billoblog com>]

I am using evolution v. 3.44.1-0ubuntu1 on a laptop with kubuntu (Kubuntu 22.04).   It works fine, but the little envelope icons are awfully small, and my old eyes are having a problem seeing whether or not I've replied, etc.  Here's a screen shot.  I'm using Buuf icons for my system icons.  Is there a configuration option to make the icons larger?

Thanks!

billo