The first step in selecting an edge is to consider the use of the MIrror. (Images do not represent actual Edging of glass.)
First Measure the Width then Measure the Height.
What type of Edging should I choose?
How To Measure Your Custom Cut Mirror
How to measure with ruler.
Seamed Polish Edge:
Mirror edges are sanded to a dull sharp edge. This is to make the Mirror safe to handle. Seamed edge is used if the Mirror is to be framed and in projects where the edges are not visible.
Beveled Polish Edge:
The edges of the Mirror are cut and polished in an angle.
House Polish Edge:
Sanding the entire 1/4" edge resulting in a matted finished edge.