These memo pads are made of PET materials, which are safe and in use. They are suitable for home, school, office, travel, etc. Lightweight and portable, small size is easy to carry and store, and it won't take much space when you store them, Features -Color:Transparent -Material:PET -Size:9.50X7.00X0.01cm,7.60X7.60X0.01cm,7.60X5.00X0.01cm/3.73X2.75X0.004in,2.99X2.99X0.004in,2.99X1.97X0.004in -Transparent design, make you mark important documents without stain book, clear making learning easier. -Creative and portable, these memo stickers sheets more convenient to store and carry out. -The notes can self-stick well, doesn't leave any traces of glue, and can be easily removed. -Removable adhesive for easy re-positioning, which makes them convenient to use and paste. -Excellent for school, offices, study rooms, travel, or family use. A good gift choice for students, teachers. Package list: 30 x sticky memo pads (3 sizes)