75 - 90gsm: Standard office paper, used in your desktop laser printer or photocopier
100 - 140gsm: Heavier paper that can withstand a little more wear and tear; commonly used for stationery paper for things such as letterheads
150 - 200gsm: Heavier paper and lightweight cardstock used for posters, leaflets, flyers and pages inside a book.
200 - 230gsm: A thinner card perfect for crafts and posters.
240 - 290gsm: Perfect weight for handmade cards, Cards within this range still have some bend to them. also make great wedding invites.
300 - 350gsm: A heavy cardstock, cards in this range have a higher quality feel to them, and are often used for business cards. Also sutible for wedding invitations and handmade cards.