This sale is for a quantity of four of the 3 inch plate hangers. These plate hangers are wonderful! They are easy to use, safe and can be removed without damaging the plate. They are totally invisible with no unsightly damaging hooks, clips or springs. They work by solidly adhering to the back of the plate or object and are easily removed with warm water. The disc plate hanger also has excellent adhesion to unvarnished wood, tiles, ceramic art, opaque fused glass plates and 3D objects of many sizes. They are not recommended for metals, painted surfaces or if you wish to preserve a paper label. They have been used successfully for decades in England. The discs can be trimmed to fit the shape of your unique piece. The discs come in 5 sizes: Order the 1.5 inch for plates up to 4 inches in diameter, 2 inch for plates up to size inches in diameter, 3 inch for plates up to 8 inches in diameter, 4 inch for plates up to 12 inches in diameter and 5.5 inch for plates up to 6 pounds in weight.