Very basic design. 155 mm / 6.102 in long. Designed to hold a smartphone but is also capable to hold a tablet.
No supports are needed when printing. Print on its side. 0.8 mm wall thickness is all that you need. Anything from 10-30% infill should be fine.
I am able to modify this holder if asked. Example: Adding text or placing slots for round rear cell phone holders to fit in.
Be willing to design a holder from scratch based on your needs. Please feel free to reach out to me.