I have a plain bathroom mirror need idea for a boarder
this is one way (photographs) I made a border. Here is a mussel shell border.
Here are a few Hometalk projects on the subject. It's on my punch list as well.
Hi Rita! Take a look at these ideas for your mirror!!
This is the easiest way: https://thehoneycombhome.com/how-to-easily-frame-a-mirror/