Size: approx. 2. 2 x 1. 5 x 1 2 cm. 86 x 0. 59 x 0. 47 inches. 50 x Hanging Hooks Please look at the pictures carefully for detailed information about size and style before purchasing. Please keep them away from children under 3 years. Large quantity hooks: you will receive 100 pieces traceless photo hooks, one of their advantages is that they do not leave marks on the wall, do not destroy the wall, so that the integrity of the wall is ensured, enough quantity and complete for convenient use. NEED A HAMMER: No drilling. Quick and easy installation. Simply place the side of the picture hook tip on the concrete wall and gently hammer the four steel nails into the wall one by one until the nail ends are flush with the top of the white plastic wall hook. VARIOUS WALL HANGING SOLUTIONS: Our hard wall hooks are suitable for all kinds of wall surfaces. They have good effects on cinder block walls, brick walls, lime walls, stucco walls, plaster walls, concrete walls, sticker walls, wooden doors and cork panels. Note: this frame nail hook is not suitable for glass, ceramic tile, stone wall, load-bearing wall. MULTIFUNCTIONAL HOOKS WITHOUT TRACES: Whether you are at home, renting a house, or in an office, you can use your inspiration to freely combine different traceless hooks to decorate your wall, such as art painting, picture frames, clocks, tapestry, and you can also use keys, bags and other items.