Here's some tips on how you can store your stencils. I store mine in a 12x12 storage box you can get from Michaels. I like that I can toss my stencils in when I'm finished with it.
Another you can use a 12x12 page protector that has 6x6 slots by We R Memory Keepers for your 6x6 stencils as well as a 12x12 page protector for your 12x12 stencils in a binder. Or if you like you can place your 12x12 that has your 6x6 stencils in the box too. Hope this helps on how to organize your stencils.

