ROYAL NAVAL PORTHOLE MIRRORED MEDICINE CABINET from http://www.restorationhardware.com/. Click through to see more porthole mirrors for the bathroom.
Porthole Mirror Medicine Cabinet: http://www.completely-coastal.com/2012/02/porthole-mirrors-for-bathroom.html
Porthole Mirrors - already have a few mirrors like this picked up from antiques fairs but you can never have too many...
Shipwreck Verdi Bronze Finish 20" Porthole Mirror Nautical Tropical Home Decor: Amazon.com: Kitchen & Dining
Bathroom Ideas | Double Vanity | Bath Design | Porthole Medicine Cabinet | Nautical Interior
Mirrors mirrors mirrors!
Vintage Brass Nautical Port Hole mirror
Round mirrors are held by thick wooden frames that evoke the glamour of a luxury liner. Shiny brass trim on the inner rim accentuates the clean and simple desig
Mirrors - Porthole Mirror | Pottery Barn -round rope hung mirror, port hole mirror,
diy round mirror frame | Rope Nautical Decor Mirror Coastal Mirrors - kootation.com