This mirror stands alone. We've been searching high and low for a free-standing mirror for a client. Finally landed on this: the Triptych Vanity Mirror by Baker Furniture.
It's perfect for areas where you need a mirror but have no wall to hang it on. In our case, it's at a bathroom sink that has a large window in the spot a mirror would usually hang. This tri-folding mirror is lovely. Unfortunately, the price tag is high: $5,250. We've found there are so few mirrors out there that do this job - maybe that's why they have it priced so high.