I purchased this mirror, added a couple of hanging brackets on the long edge, and hung it vertically, in my bathroom. I had to take down a HUGE mirror (typical of 90's bathrooms) to paint, and since I eventually want to replace the vanity, I got this mirror as a temporary solution and it worked perfectly.
Beautiful mirror. Great price. Frame thickness is .39 (3/8") so do not buy the mounting kit advertised on the mirror web page. They are too small and they are drywall use only. Find hardware for door mounting.