This is a FreeCAD designed remix of my OpenSCAD parametric cable tie. FreeCAD file included.

I've also included 4 STLs generated from this model. Most needs are easily achieved using one of the 4 included models, but if you need something longer or bigger or thicker, you can pretty much generate anything you want. I found it best if thickness is about 1/2 of base width.

To use, simply open up the FreeCAD file (I used 0.21.2), go to the spreadsheet in the model. There are two sections of properties. You can change any of the 4 "User Supplied Values", and the rest will compute based upon those numbers.

This one is designed slightly different, giving a little more space between the eyehole and the first tab. This should reduce printing material, but it does make the generated models a bit longer.