60gsm - 100gsm: This is a very lightweight paper and will bend easily.
100gsm - 140gsm: Paper with this GSM range is sturdy enough to withstand a bit of wear and tear.
140gsm - 170gsm: Best paper grammages for home printers and inserts.
170gsm - 200gsm: Heavyweight paper, lightweight card.
200gsm - 240gsm: A more sturdy card but will still have some bend.
240gsm - 300gsm: The most popular grammage range when buying card. It is likely to be the stock that high-quality wedding invitations are printed on.
300gsm+: This GSM is heavyweight card, this grammage range tends to be thick.