For the shaving kit, the campground or the kids, nothing says no nasty glass shards like plexiglass. This unframed, unbreakable, back-surfaced mirror is 3-1/2" x 2-1/2" x 3/32" thick. Please note that there is a protective film covering the front of the mirror which you need to peel off before using.

Couldn't tell it from the glass variety by just looking. This plastic mirror with rounded corners measures 3-15/16" x 5-15/16". Comes with protective film on both sides. We're thinking kids, camping, or just a nearly-unbreakable travel item. Pretty flexible, too, if you like fun-house mirror effects.

Brand spanking new military surplus. New/old if you will. Perfect project mirror for light experiments. It is back surface. (That means the mirror coating is behind the glass.), some may have clear enough backs to be used as front surface mirrors, so bonus for you! 22mm diameter and only 1.5mm thick. Buy a bunch they are cheap!