Accent Design Round Stak"n Stor is a great compact acrylic organizing container. The compartments screw together, so the bottom of one compartment is the top of another. This is the ultimate space saver for needlecraft supplies, small notions, craft supplies, beads, household items, and any other items you want to organize. The clear compartments make it easy to see what you have stored. 70 mm- 4 compartments that are 1 deep each and 70 mm in diameter.