My first attempt at a printed stand for a safety razor and Brush. Designed for a Merkur Futur and a fairly average shaving brush. Overall height 110mm and hook widths of 16 and 27.5mm

This one printed without issue with 0.3mm layers, 2 perimeters and 30% infill. Sliced using Slic3r.

The hole in the hooks to accommodate the shaft is 5mm. The shaft itself is ~6mm depending on the accuracy of your printer. The surfaces can be threaded to M6 or the hole drilled out to a tight fit.