My wife's growing collection of Magic: The Gathering cards needed a better place to live, and Ikea had a sale on their ALEX drawers, so we bought some and I modeled these drawer inserts and card dividers into a system we've been using for years at this point. Sharing them here for others to enjoy!

Note - The tags you can see in some of the pictures can be found here: https://www.printables.com/model/553795-ikea-alex-drawer-tag

Side-note: some credit for this design also belongs to Zack Freedman for his work on Gridfinity. These started their life as a Gridfinity project but ultimately failed to work well under those constraints. Still, I did end up swiping the stacking profile I used from his excellent system, so the credit for how well these can stack together definitely goes to him.