Size and Quantity: The finished product of the paper thread winding bobbin is about 80x80mm/3.15x3.15". Package includes 16pcs of column spools, 16pcs of round discs and 32pcs of plastic buttons, you can make 16 sets of finished products with them. Easy to Install: These paper thread spools are very easy to use. Just put the discs on both ends of the column and fasten them with the plastic button provided, hold end of the thread against the flat part, then begin to wrap around the middle. Paper Thread Spools: You can mark on the paper spool as you like. It is convenient for you to identify threads with different colors and materials. The middle of the paper spool is hollow, you can fix it on the stick to facilitate your operation. Material: Our spools are made of paper body and plastic buttons, which are lighter in weight, detachable and easier to carry compared to wooden or plastic spools. These paper spools are of great quality, durable and sturdy and can be reused. Wide Application: These empty sewing spools are great for encircling of thin and short strings, wires, decoration chains, twine, cords and more. They can make your strings and chains not too messy and can save some room for your home and office.