I had the Smith Optics T-Nine for years. Lost them in a river a couple years ago and was devastated. Got these sunglasses last year and i have to say they are probably the best replacement for my T-Nines. Too bad Smith doesn't make those anymore. For fit...I have a large head and love full coverage lenses. These are perfect except the lens doesn't cover to the bottom of the eye, you still get a little gap there. Oh well, none did as well as the T-Nine.