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This is the Parametric Modular Trading Card Storage Box (Core). That is a long name, so let me explain…
This model can function in two ways, a simple modular storage box for your cards OR a core standard for you to be able to design your own box! I've provided the F3D file with a parametric design so that you can adjust the model to suite your needs. From there, you can build out the box in any way you like! Add a lid, design inserts and storage boxes to go in your box.
I've included some models to get you started, which serve as different sizes that can fit on the various Bambu printers
- 15U for the A1 Mini
- 21U for the A1, P1 and X1
- 27U for the H2
There are many sizes of card that you can adjust this box to fit, which I have a one page document explaining that at the bottom, but I've gone with a box that is Toploader width. The reason for this is that it allows you to more comfortably create accessories that fit in the unit system well and hold cards while doing so. The 21U is capable of holding; 725 Raw Cards, 500 Single Sleeved Cards, 330 Double Sleeved Cards and 140 Toploaders. I haven't created many accessories yet, but here is what I have included:
- Standard Dividers
- 21U Double Sleeved to Toploader card adapter (also great for single sleeve and raw)
- Adapter Dividers
Following up this release, I have a roadmap of where I want to take this further: (Last picture)
- Simple Box with Lid (Already Designed, 21U)
- Premium Box with Acrylic Window Lid and Artistic Side Panels (Already Designed, 21U)
- 60ct & 100ct Deck Boxes
- Storage Bins
- Additional versions of 15U and 27U (I do not have a H2S to properly test, boost me to help me get there!)
I would consider this my first proper design release, so any comments or recommendations would go a long way! If this design garners enough support, I'll continue to iterate and improve the design. I have a lot of ideas of what I want to do with it!

Originality of the Model
The author declares that this work is their personally original model
This model is licensed under the following terms:
Credit must be given to the creator
Only noncommercial uses of the work are permitted
Remixes must be shared under the same license
Models(10)
Modular Card Box - 27U Double Wide.stlDesigner84.07 KB
2025-10-26
Modular Card Box - 27U Triple Wide.stlDesigner126.06 KB
2025-10-26
Modular Card Box - 27U.stlDesigner42.07 KB
2025-10-26
Modular Card Box - 15U Double Wide.stlDesigner46.57 KB
2025-10-26
Modular Card Box - 15U.stlDesigner23.32 KB
2025-10-26
Modular Card Box - 21U Double Wide.stlDesigner65.32 KB
2025-10-26
Modular Card Box - 21U.stlDesigner32.70 KB
2025-10-26
Modular Card Box Sleeved Card Insert - 21U.stlDesigner4.18 KB
2025-10-26
- Modular Card Box.f3dDesigner
378.90 KB
2025-10-26
Modular Card Box Dividers Blank.stlDesigner117.27 KB
2025-10-26
View all(10)












