Paper Weight (GSM)

GSM (grams per square meter) is the international standard for measuring paper weight and thickness. Higher GSM indicates heavier, thicker paper. Common GSM ranges: 60-80 GSM (standard office paper), 90-120 GSM (brochures and presentations), 130-170 GSM (business cards and postcards), 200-300 GSM (cardstock and covers). In the US, paper weight is also expressed in pounds (20 lb, 24 lb, etc.), which measures the weight of 500 sheets. To convert: 20 lb = 75 GSM, 24 lb = 90 GSM, 32 lb = 120 GSM. Copiers have maximum GSM limits - exceeding them causes jams. Standard copiers handle up to 80-90 GSM reliably, while higher-end models support 130-300 GSM for cardstock and specialty media. When printing on heavier stock, use bypass trays rather than paper cassettes, and adjust fuser temperature settings for optimal results. Always verify your copier's supported GSM range before purchasing specialty paper.