What is this?The magnetic display frame of the magnetic window sign is interlocked, allowing you to quickly and easily change the content inside the sign. This wall mount sign holder has its own adhesive on the back and can be attached to any smooth, solid surface, suitable for refrigerators, glass, window, doors, wood boards, tiles, walls, window, offices, etc.What will I get?The self adhesive magnetic wall sign frame is in size of:Inner frame size: 5 x 7 inch/12.7 x 17.8cmOverall frame size: 5.9 x 8.1 inch/15 x 20.5cmMaterial: Magnetic frame, PVCPackage contains: 8pcs x Magnetic Wall Sign HolderAre there any advantages of the product?The wall sign is made of soft PVC.