The current width is 25mm but this can be scaled in the slicer. Only scale in 1 dimension to adjust for belt width!  Scale in the other two dimensions if your belt is thicker than standard!

Example scales:

- 50mm strap: 200%
- 35mm strap: 140%
- 25mm strap: 100%
- 20mm strap:  80%
- 15mm strap: 60%
- 12mm strap: 48%
- 10mm strap: 40%

[1mm width = 4% scale]

Suggested material: ABS/ASA. Only use PLA for light loads. Use 5 walls at a minimum! I suggest using PLA if you only want to hold down cardboard boxes. For Furniture, or similar, use ABS, ASA or stronger
Print in this orientation for best results:
 

Use the "SmallerEdgeRadius" models for a higher strength hold. I suggest using this model only if you know your box will have 90 degree corners exactly. Many cardboard boxes bulge from the middle, and their edges are 91+ degrees. The big radius allows the parts to eversoslightly bend and conform to non-perfect edges. The smaller radius variation has more material in that corner, making it stiffer and stronger, but may not be as snug of a fit for imperfect edges

For another strap-based model, check out the strap clamp:
https://www.nexprint.com/en/models/G3251618