Medium Round 5/8" x 1 1/2" Stand-Offs
This is the most popular stand-off for mounting panels. These work for panels greater 10” and less than 30”. Use all four stand-offs to distribute the weight around the glass unless it is a small narrow panel (less than 6” x 12”) then you may use two place on a diagonal.
The round stand-offs are designed to have more than one stand-off holding the piece of glass art to the wall. Typically four stand-offs are used on square panels. For larger panels increase the diameter of the stand-off, see chart for more detailed information.
Generally, any panel/flat glass over 10″ X 10″ will need more than one stand-off to equally float the glass off the wall. You want to place the stand-offs close enough to the edges that you can get your hand behind the work while installing it.