What's The GSM Of Paper?

GSM means 'Grams Per Square Meter'. Thickness of paper is determined by its weight in grams per square metre. To be simple, it helps buyers and suppliers to know exactly about the quality of paper. The higher the GSM number, the heavier the paper.
You may ask "What does gsm in 80gsm paper mean？". That's to say, with 80 gsm paper, a typical A4 paper weighs 5 grams.

Although paper is not quite as extreme, between printed jobs that use different boards that might have the same but with different thicknesses. It mostly happens  in uncoated boards with cheaper grades having the same thickness but weighing less than more superior grades.

The followings are the common board weights and their approximate thicknesses:

• 200gsm = 150 to 220mics
• 250gsm = 190 to 285mics
• 300gsm = 237 to 342mics
• 350gsm = 284 to 395mics
• 400gsm = 315 to 460mics

Photography paper is considerably thicker than conventional multipurpose paper. Multipurpose paper generally has a paper weight of 20 pounds while photo printing paper ranges from 28 to 125 pounds. Low grade photocopier paper is around 80gsm. Letterheads 100-120gsm with good quality letterhead around 120gsm. Business cards are around 350gsm and flyers around 300gsm-350gsm.