Im actually new to DD and thus dont use any new class mods yet (for first run) and these mods that Im submitting might be too big or annoying to do. If thats the case, I apologize ahead of time, I just noticed that trinkets from these mods also are outside the resized border.

101 New Trinkets by Pseudonomenclature
Singleplayer Butcher's Circus: LITE by Kryh un
The Ringmaster's Prizebox by MetalGy

Sorry again if these are too much, or not necessarily what you were talking about.

No problem.
Yes I downloaded them and checked the files for their icons, located in the "panels" folder of the mod.
I added all of them from those 3 mods. Update and let me know if they're good.

At quick glance all seems to be in order. Thank you very much.
Out of curiosity, if I were to want to add trinket support in the future how complicated is it to do once youve located the icons in the panels folder like you said?

you have to resize them from 72x144 to 48x96, and replace them in your mods folder. I mainly did this mod because I play on multiple devices and i'd have to do that for each mod on each device, or copy the files over. If it's a dedicated mod, It just persists across my cloud saves

Resize the png with something like adobe express or are there better programs? Also if I change the image size and then replace the old file, will everything be undone if the mod updates? If so is there a way to avoid that? Thanks again for answering.

Yes use any image resizing method you want. The aspect ratio is the same. You are also correct in the second question, if the mod in question updates, it replaces your new icons (most likely).
That's why I made this mod, so that won't happen

Got ya, yeah I just didnt want to bug you everytime I played with a new class mod (since they all seem to add their own trinkets).