Category and sub-category icons - should we bother?

If anyone wants to make a logo, here’s the raw materials.

The ideal category logo size seems to be around 32x32 pixels. The one below is 41x41.

Resizing the various logos provided in the link above doesn’t work great in the tools I have, so an SVG file for working/local group artwork would help so we could make clear small versions of icons like this…

Or perhaps CSS or a Discourse configuration could be used to constrain icon sizes - @nealbastek?