Hello.
Im currently working on my personal Portfolio, so I'm including some Leathercrafting stuff.
Here is the template and video for a simple Card holder (up to 6 cards). It comes with a web 3d configurator so you can test different leather types, colors, thread, etc. (If it is slow try to make your browser window smaller to reduce resolution)
Video:
3D configurator: https://www.raulreyes3d.com/vch02a3d
Pattern https://www.raulreyes3d.com/tutorials/2020/5/9/making-a-card-holder-vch02a