Sachet types explained: stick packs, 3-side and 4-side seal
Single-serve sachets come in a few standard formats. Each affects how much printable space you have, and therefore how small-pack labelling rules apply.
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3-side seal
One web of film folded over and sealed on the three open sides. It's simple and common for powders and capsules.
4-side seal
Two webs of film sealed together on all four sides. It gives a flat sachet with a full printable front and back, often with crimped edges.
Stick packs
Long, narrow tubes with a back seal and sealed ends, made for single servings of powder that pour straight into a drink. They are slim, so the printable area is small.
Centre or back seal
A pillow-shaped sachet made from one web, with a seal running down the back (a fin or lap seal) and sealed ends. Avoid putting text over the back seal.
What it means for labelling
- If the sachet is sold on its own, it needs the full labelling, subject to small-pack rules. If it's only sold inside a carton, the carton carries it.
- Under 80 cm² largest surface, the minimum x-height is 0.9 mm rather than 1.2 mm.
- Leave clear space for the batch and best before printed at packing.
- Keep text away from crimped seals and tear notches.
More in our guide to checking sachet artwork.
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ProofMyLabel is an automated pre-check, not regulatory sign-off or legal advice. The food business operator remains responsible for the packaging.