On the right is my old standard ring that all my TARDIS rings are now. On the left is a new ring that I'm experimenting with. Lower profile, you could actually put this one in your pocket and thinner. The disadvantage is that it needs to be glued together. Still, this ones a ways off before it's ready for prime time.
Meanwhile, I think I'm gonna ramp up production of the TARDIS rings I have and hopefully free up some time for these projects I need to work on.