I couldn't find any reasonably-priced replacement cards for Catan, so I created my own.
They are standard American size (54x80mm).
These models have been specifically designed for 0.4mm nozzles. Any scaling of the models or use of a different size nozzle can result in subpar results, though I suspect a 0.2mm nozzle would work very well.
My print profile has multiple plates to choose from. DO NOT PRINT THEM ALL! The plates with single cards are essentially just for testing.
You need 19 of each resource card. I have prepared a plate for each resource with 10 of that resource card on it. This means that you can print each of these plates twice and have an extra card for each resource. I found this useful, as usually one of the cards didn't come out perfectly so I could keep the imperfect one aside as a spare.
For the development cards:
You need 14 knights. I have added a plate with 7 knights on it that can be printed twice to accommodate this quantity.
You need two of each “actionable” dev card (road building, YOP, mono) and 5 victory points. I put each of these on their own plate so the colors can be customized. However, if you want to follow my color scheme (or something similar), I have combined all of these cards into one plate with 11 cards on it for ease of printing.
The colors I used:
Jayo Black PLA+
Jayo White PLA+
Bambu Lemon Yellow Matte PLA
Bambu Mandarin Orange Matte PLA
Eryone Matte Lilac PLA
Bambu Grass Green Matte PLA
Bambu Red PLA Basic
Bambu Latte Brown Matte PLA
Bambu Gray PLA Basic
I would recommend using as much matte filament as possible, since it is less transmissible than standard PLA.
I added building cost cards as a separate profile because the first layer has to be printed incredibly slowly due to the high detail.