Adequate Quantity: You will receive 100pcs wooden square thread drops and 4pcs iron loose leaf book binder hinged rings. Enough quantity to meet your needs for all sewing thread assortment. Reliable Quality: These are made of natural wood, strong and durable, not easy to break, and can serve you for a long time. Size Reference: Each size is about 49.5x34.5mm/1.95x1.35", 2mm thick, hole: 8mm/0.3", Rings: 3mm thick, inner diameter: 50mm/1.96". Easy to Use: The large hole can be used to manage embroidery threads, while the small hole can be threaded with an iron ring to manage. You can write thread colors and symbols on them for easy matching with cross stitch patterns. Ideal Choice:They are ideal for storing your threads after you finish a kit, they won't get your floss tangled and keep your floss in order.