Oh, I forgot ... I bought 6 collapsible holders at hancock fabrics to hold my swap blocks. They are cardboard (chipboard?) covered in a look-a like alligator vinyl . (None of the cardboard shows) They stack well and are large enough to hold even the 12 1/2" ones. They are sitting out where you can see them, so I wanted something presentable.

This is what I use also. I found it on clearance for $.99 at a store that doesn't normally carry scrapbooking supplies - probably why it was on clearance, lol.