This is an improvement over my earlier upload https://www.thingiverse.com/thing:5172432

It features a stopper tab to keep the clip from slipping under the trouser's belt loop. 

The enclosed .stl file fits a 30 mm high and 3 mm thick belt. You may have to 

• Either use the Thingiverse Customizer (see link under the picture above)
• Or use the OpenSCAD source file (see below)

to create a .stl file (= remix) fitting your belt's dimensions. 

The Customizer requires you to be logged into your Thingiverse account. Enter your dimensions, and after about a minute or two it will deliver your remix into your personal profile. Simply ignore the "Script timed out" message. To delete a remix in your profile: Open the remix, click on "Edit Thing", scroll to the bottom and delete it.

For OpenSCAD no account is required.

As always I include the OpenSCAD source file for you to adapt and/or improve:

• Download and install OpenSCAD from https://www.openscad.org
• Launch OpenSCAD and open the enclosed OpenSCAD source file (/File/Open).
• Amend the parameters at the top of the file or even amend the code.
• Save your changes (/File/Save).
• Render the design (/Design/Render).
• Export the rendered design e.g. as a .stl file (/File/Export/Export as STL).
• Slice and print.

See my other designs at
https://www.thingiverse.com/thinger13/designs