To avoid mechanical jams or printer damage, you must match three key dimensions: Width, Outer Diameter (OD), and Core Size. The most common width for POS systems is 80mm, while credit card terminals typically use 57mm. Ensure the Outer Diameter does not exceed your printer's compartment capacity. Additionally, check the Core Type (Honeycore, Plastic, or Cardboard) and its Inner Diameter to ensure it fits the printer spindle. High-quality rolls should also feature a Red End-of-Roll Warning Stripe to alert staff before the paper runs out.