: Letter Size (8.5 x 11 inches) is the North American standard, typically at a weight of 20 lb or 24 lb . International Standard : A4 (210 x 297 mm)

If you are looking for general printer paper recommendations, the most common options include:

Could you please clarify if this code refers to a , a product SKU , or a technical specification for a particular machine? A-Series Paper Size Dimensions (in, cm, mm) - Neenah Paper