This is a mobil phone case there can be adjusted to the most mobile phones. You can have plastic film in front or don't. I use it at fitness and at work, when I am places where I can't hear my phone in the pockets.

For this iphone 11 I have made it to fit the apple cover in size.

In openscad you can fill in your phones measurement at create single parts by unselecting the other parts and the do a rendering please remember to give each STL a unik name so your not overwriting them when saving them.

I have used 3mm screw, and 3mm nail for press lock if the screw never has to be taken out..

I use a 3mm thread cutter to prepare for the screws.

For strap I have a tiny o-ring for adjustment and also safety it it should get stuck.