Product Specifications Spool Diameter: The diameter of the spool is 2 inches or 5 centimeters. Hole Sizes: The outer hole sizes are 3 millimeters in diameter and the inner hole is 5.5 millimeters in diameter. Ribbon Width: The ink ribbon width is 1/2 inch or 1.27 centimeters Ribbon Length: 10 meters or 32.8 feet TIPS: If your model is not listed, it is still possible that our replacement will work with your machine. In the event that it does not fit, you can always re-spool our ribbon on to your old spools.