Package Content: You will receive 4000 pieces of hole reinforcement stickers in yellow color, 40 labels per sheet, 100 sheets, total 4000 labels; sufficient quantity can meet your use needs. Quality Material: Made of quality paper material, self-adhesive and easy to apply. Versatile Use: They can be used for reinforcing punched holes in binders, loose-leaf folders, loose-leaf papers, and other paper documents, ensuring that your important papers stay securely organized. Easy to Use: Tear off the donut sticker and apply it to the hole in the loose-leaf paper; it is easy to apply. Wide Application: Suitable for schools, homes, libraries, and offices. Our hole reinforcement stickers protect and reinforce punched holes in paper documents. No more worries about pages falling out or damaged. Specification: Material: paper. Color: yellow. Product Size: outer diameter 13mm (0.51 inch), inner diameter 6mm (0.24 inch). Package Contents: 4000 x hole reinforcement stickers. Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3cm.