Created this modular USB cable roll as a storage solution for cables in my car. They are designed to be flat enough to fit almost anywhere. If you print multiple, you can stack them in a reasonably stable way. Any USB connector (tested all that I own) should fit in the hole in the middle.

I've printed mine with:
.2 layer height
100% infill
tree support, touching build plate
205°C nozzle
60°C bed