Description: These hooks are perfect for hard walls. Not for use on hollow or soft wall surfaces. Perfect for hanging picture frames on solid walls or on wooden furniture, also suitable for other small gadgets, cloth or hats. Great for hanging picture frame, photo frame, mirror, clocks or decorations on wooden wall, hard wall surface. Easy to use, just hammer pins straight in. Easy to remove and will not leave a big mark. Very useful accessories for your daily life! Specification: Material: Plastic Color: White 4 Sizes(Total 80pcs, Each Size 20pcs): Size XL: Approx. 21x50 mm / 0.83x1.97 inch Size L: Approx. 20x40 mm / 0.79x1.57 inch Size M: Approx. 15x30 mm / 0.59x1.18 inch Size S: Approx. 15x25 mm / 0.59x0.98 inch Package Includes: 80 Pieces Picture Frame Hooks Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks for your kind understanding!