Ample quantity and reliable quality, sufficient to meet your long-term needs. Versatile uses: These self-adhesive index card holders are suitable for refrigerators, studies, kitchens, or cars, and can be used to store business cards, sticky notes, and other small items. They not only effectively reduce loss but also protect against dust and water. Instructions for use: Simply peel off the label on the back to easily attach it to refrigerators, walls, glass, or other smooth surfaces. They can also be used for diaries, notes, etc., for convenient organization and storage. Features: Double-sided transparent card pockets for easy viewing of internal information; strong self-adhesive backing for easy use and durability; open design for easy loading and unloading. Size and material: Each self-adhesive label holder measures 6 x 10 cm, a moderate size for easy use and portability; made of transparent PVC material, lightweight and reliable, easy to see.