Aloha samantha6,
You'll see various sized mirrors when taking a tour of Learning Strategies, ranging from small stand up, makeup-looking ones, to small to medium framed ones off to the side of desks, facing the incoming door/entry. If your office is a car, where would you locate a side/rear view mirror to see the entry opening. It all depends on the direction of your desk/chair and your entry.
"I find it normally a little rude to have my back to people, so this way I can see people and greet friends and clients as they come in."
Much Love, Shawn