The first divider on the market that can change its width to fit into almost any unused box space. Tidy up your deck box! No matter if you want to fill up space between two decks of cards or keep your deck boxes safely in place, the Sizemorph Divider has you covered. Its width can vary between 5 and 30 millimeters, allowing maximum flexibility. The Sizemorph Divider comes with a foldable register tab that makes sure that no cards are harmed while closing the box. The register tab will fold to the back and unfold when the box is opened.