After dealing with so many clip on wire shelf tags that would not stay in place, we made our own! This set includes 20 heavy-duty clips that are made not to easily fall off or slide around. They measure 40mm wide, 25mm tall (1.5" wide, 1" tall). They are designed to pinch tightly onto 6mm wire shelves. We use the everyday wire shelves you find at Target or Home Depot/Lowes. You can use a Permanent marker or your own table atop these clips. In white. Super fast shipping - purchase by 5pm EST and we ship out the next business day!