I put mine in an IKEA Alex drawer with rubberized shelf liner, so they can lay flat and or readily visible. I need to expand to a second drawer as the first one is over full.

I keep mine in a Rubbermaid clear storage box with lid. Mine aren't very big- Angela Walters sets and Westalee beginner set.
Julia- I've been practicing with mine. They really are fun to use. I haven't used them on a quilt yet but that's one of my goals for next year.

this is a good idea! There is one at work I am not using and it would be perfect for my rulers. I'm going to see if I can buy it from them. More than likely, once I ask them they will give it to me. 😆