What gsm actually means
gsm stands for grams per square metre — the weight of a sheet measuring 1 m × 1 m. Higher gsm means thicker, more solid paper. Everyday printer paper is 80gsm; decent letterhead is 100–120gsm; flyers are usually 130–170gsm; covers and business cards are 250–350gsm.
80gsm — the office standard
Good for internal memos, revision notes, everyday photocopying and anything where the paper isn't the point. Cheap to print in bulk. Too thin for anything you'd hand to a customer and want to feel professional.
120–170gsm — the flyer sweet spot
This is where "real" printed matter starts. Flyers, leaflets, menus, programmes, premium letters. Thick enough to feel substantial without being cardstock. 170gsm double-sided in full colour is a common specification for promotional flyers.
250gsm and up — covers and cards
- 250gsm — feels like a proper card. Postcards, brochure covers, saddle-stitched booklet covers.
- 300–350gsm — premium business cards. Not used for inside pages (too stiff) — only for covers.
- 400gsm+ — heavyweight business cards, wedding stationery, specialist work.
In short
If you're unsure which gsm fits your project, we keep samples in the shop — pop in and feel the difference before you decide.
Published 15 April 2026 by the Copy Shop Putney team. Shop 395-A, Tildesley Rd, Putney Heath, London SW15 3BD.