This print is intended to be printed with TPU or other soft filaments, as the constant flexing will cause other plastics to wear over time and break. I used Overture TPU with my P1P, giving good results.
The design is made for 4mm Paracord (with some give). There are a couple different sizes, all various lengths of the flat board part, depending mostly on the size of the phone. I used a Google Pixel 7 and a Samsung Galaxy S20 FE as a benchmark for size. In case one wanted to modify, I included the Solidworks file.
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I used the generic TPU profile, with the main change being 100% infill.
The author remixed this model.