Just go with the circumastances...?

Question

Say you are Christams shopping and bought shoes and a hat. If you want to see you whole self in a verticle full length mirror, is there a minimum size you need and a specific height you hang it? Or, does any size work depending upon how close you stand?

Answer 1

I can see the moon in a hand held mirror, so I would guess it depends entirely on the distance.
Obviously, the larger, the better, because you won't have to stand so far back from it.