Date posted: 4/18/2013
18g 5/16" quartz
These are very comfortable - despite the fact that one has a wonky end - and I purchased them to wear in my lip piercings when I want to be more discrete. They work nicely, though it can be quite a task trying to get the tiny little o-ring back on once inserted... It definitely helps to have extra ones around. ;)

Date posted: 4/1/2013
14g 3/8" quartz
Very comfortable, and very hard to notice without the o rings on, but with the nature of being glass, you really need the o rings as showing any expression on your face will moved them out. I use these at work and no one notices them unless they are directly looking for them.

Date posted: 3/26/2013
16g 5/16" pyrex
I actually got this for my helix piercings and it's barely noticeable! Comfortable and made out of good material of course.

Date posted: 1/22/2013
18g 5/16" quartz
I had my cartilege pierced several months ago, and the piercer put in a steel CBR. I though the piercing had healed, but it was still tender, especially after I slept. It would also get crusty and the ring would become stuck, and bump had appeared on the back. I replaced the ring with this retainer, and two weeks later it feels SO much better, has not got crusty once, and the bump has all but disappeared. The only down side is that the O rings easily fall off, so just remember to order a bunch of extras.

Date posted: 11/30/2012
18g 3/8" quartz
I purchased this with the intent of using it in my lip, and it's very comfortable - I can't even tell it's in unless I touch it with my tongue. Sadly, it's far too long, but it's not a problem because I knew it would be. I can't wait until the other sizes come back in stock - I will definitely be ordering them again!