This is a 24 pack of black thermal ribbons. Each ribbon is individually wrapped. The measurements of the ribbons are 4.33" by 1,476' if you are American. They are 110mm by 450m if you aren't. These ribbons are Resin Enhanced Wax, which means they are good for general purpose. They will not work well on synthetic labels or labels that will be in harsh conditions. For normal labeling purposes these ribbons will be just fine. They are the exact width needed for printing on a 4" across thermal label. They are slightly wider to allow the printer to grasp the ribbon better and keep tension. These ribbons can print on labels that are already colored.