A simple case for nail clippers by the brand Scholl.

This one features:

• Exact fit to avoid debris falling out
• Two small rails to keep the handle in place when unused
• Little knobs on the inside that click into the hole at the end of the nail clipper
   

Note that the case may be a bit hard to detach from the clipper for the first couple of times. The material wears down over time and after a few cycles of attaching and detaching, it becomes notably easier.