Hang a mirror by mounting it to the wall with sturdy brackets and a length of wire that is strong enough to support the mirror's weight. Place the mirror on a bathroom scale before hanging to get an idea of how heavy it is.
Attach D-rings. Attach two D-rings to the back of the mirror one-fifth of the mirror's total length from the top. Use small screws to secure the rings.
String wire. Twist a length of wire around one of the D-rings. Loop the wire around the other ring, and then double back to the first, leaving a little slack.
Hang the mirror. Drill a hole in the wall, and insert a wall anchor and sturdy hook. Place the wire over the hook to hang the mirror.