I needed to put up those small, 12"x12" mirrors you can get at any home improvement store or Wal Mart. The normal "stick-on" style way of doing it was not going to work on the surface I was using so I remixed the original mirror corners using Sketchup. I printed with 100% infill and .3 layer thickness using ABS. For the 4-slot mirror holders I used supports and printed them flat. For the other sizes I used a raft and printed them on their sides. To create a design you must print multiple copies of the different designs depending on where they will be placed. For instance to create a simple 2x2 design you will need the following: Qty 1 - x4 Qty 3 - x2 Qty 1 - x2 with open side Qty 3 - corner Qty 1 - Open side corner You have to leave one side open in order to slide in the mirror after you've mounted the clip. Note: The x3 mount is for a stepping pattern.