Simple

If that’s what you want here is the link to Eyeline Golf. They have a few different putting mirrors and sizes that fits your need. And I’m not a paid professional. I’m just a huge fan. Don’t get hung up on that method. There are different putting styles. The best one for you is the one that makes putts. Just make sure that you do the same thing over and over. Find your stroke that makes the most putts and stick with that! Good luck and play well!!