My own collar looks a little similar to the silver Eternity collar on the left hand side, only mine has a padlock in the back. W/we got it online at JT's Stockroom (I also have the typical studded black leather collar). I wanted a collar that I could wear 24/7 and pass off as a choker, since I'm very much in the vanilla world. Since I'm the only sub I know of around where I live and since Master and I aren't part of the public scene, I couldn't say what other kinds of collars subs are wearing these days.