Once I have not found a phone case I wanted on the Internet...
It's just an idea, maybe it will be useful for someone.
You will need:

• silicone phone case;
• thin marker;
• fineliner;
• tape;
• paper printout;
• means for cleaning screens.

The picture is not covered with varnish, if you want to, you can do it, but since it is between the phone case and a layer of silicone, it will cost a lot of efforts.