Package Contains 3 sheets, each sheet has 50 tacks, 150 pieces of sticky tacks in total. The diameter of round putty is about 6mm/ 0.24 inch, and the thickness is 1 mm/ 0.04 inch. High Quality Acrylic Material - The sticky tack is highly transparent, with strong adhesion, waterproof, durable, non-toxic, and reusable as long as being clean. It is better and more convenient than traditional double-sided tape, good substitute of nails, pins, pushpins, tapes and staples. Easy to Apply and Remove - Just take a sticker off and paste it to target surface, tear off the protective film and then paste your item on. Leave no marks and damage when removed. Wide Range of Application - Mounting putty is for smooth, clean and dry surfaces, such as paper, wood, glass, ceramics, marble, resin, metal, plastic, tile, etc. Do not use it on powder wall, painted wall and wall paper to avoid damage. Multipurpose Tacky Putty - Cosics sticky tack is great for bulletin boards of office, home, school and classroom. Perfect for hanging light wall decorations like balloons, photo frames, murals, posters, pictures, paintings and decorations of party and wedding; Good for fixing and positioning mini potted plant, car knickknack and ornament, door decoration, vase and model. Also suitable for pasting envelope, notice, memo, note, paper strip, DIY craft artwork, Christmas and birthday gift wrapping.