A basic little 90-degree S-hook I designed for hanging items on paracord or string. 

The bottom hook is offset at 45°, which means it prints cleanly without any supports.

Holds about 1kg. It’s not built for heavy loads, but it’s quick, easy to print, and does the job for lighter tasks. I use mine to hang gift bags from a cord strung inside a cupboard.

Printed in PLA at 40% infill.

Some measurements: 
The hanger end hole is 4mm ID. 
Total length ~5cm 
Bottom straight hook is ~1.5cm long