I made this little guard to keep me from accidentally turning on my NEBO CRYKET flashlight. It's 2mm tall in the file, however you can scale it larger or smaller in the Z axis to adjust it to your preference. I ended up going with 1.5mm for a good balance between convenience of intentional use vs. protection from accidentally activation.

I printed in PLA and attached it to the flashlight with Loctite "Gel Control" Super Glue (cyanoacrylate glue).