This model was created by Joe from 3D Printy. I've adjusted all parameters to fit the credit card size filament swatches which can be found here.
The original was created with OpenSCAD, which allows for very granular adjustments.
Attribution
"Filament Swatch Stand" (https://3dprinty.xyz/project/13) is designed by 3D Printy (https://3dprinty.xyz) and shared under a Creative Commons Attribution (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/).