Paper weight is typically measured in grams per square meter (gsm) or pounds per ream (500 sheets). A standard sheet of “letter” sized (8.5 x 11 inches) printer paper, commonly referred to as “20 lb paper” in the United States, weighs approximately 5 gsm. This measurement reflects the density of the paper and not the weight of a single sheet.
Understanding this measurement is crucial for various applications. Printers are designed to handle specific paper weights, and using an incorrect weight can lead to jams or poor print quality. Furthermore, paper weight affects postage costs and the overall feel and durability of printed materials. Historically, heavier papers conveyed a sense of importance and quality, a concept still relevant in certain contexts today, such as with high-quality stationery or art prints. Different paper types, from tissue paper to cardstock, exhibit a wide range of weights to serve diverse purposes.