A roll described as 80×80 or 57×40 uses two different measurements: paper width first, then the outside diameter of the complete roll. Measuring both—and checking the core and printer compartment—helps prevent ordering paper that is too wide or too large for the machine.
Remove the roll and measure straight across the paper from one edge to the other. Use millimetres and measure the paper itself rather than the plastic or cardboard core. Common widths include 57mm for compact terminals and 80mm for many full-size receipt printers, but the printer specification is the deciding source.
Next, measure across the widest part of the wound roll. This diameter determines whether the roll can sit inside the printer and whether the cover can close. A smaller compatible diameter may fit but will contain less paper; a larger one may prevent the compartment from closing.
Some printers also specify the inner core diameter or require the thermal-coated side to face a particular direction. Compare the new roll with the old one and consult the printer label or manual. If the old roll is missing, search by the exact printer model instead of choosing by appearance.
Thermal roll sizes are usually written as width × outside diameter, such as 80mm × 80mm or 57mm × 40mm. Suppliers may add core size or paper length as another figure, so read the product specification carefully and ask when the format is unclear.
It normally means paper that is 80mm wide on a roll with an outside diameter of about 80mm. Confirm the supplier specification because naming formats can vary.
Often yes if the width, core and paper orientation are compatible, but the roll will contain less paper. Check the printer manual before ordering.
The printable side reacts to heat. Your printer manual or the loading diagram inside the cover should show which direction the coated side must face.
Choose your roll size and order online with cash on delivery.