The most common standard size of a shipping label is 4x6 inches (10x15 cm), but other sizes such as 6x3 inches (15x7 cm) or 4x4 inches (10x10 cm) are also widely used. The labels are usually printed using a special label printer, but a regular paper can also be used with a regular laser or inkjet printer as long as the label stays its original size. A regular paper can fit 4 regular-sized (4x6 inches) labels on it. It is important to adhere to the standard size and print the labels in good quality to ensure that the barcode scanners have no problem scanning the barcode.