3.5 Bags, 8th Packs & Eighth Packaging: What 3.5g Mylar Bags Really Are

If you package cannabis flower, the eighth is the unit that matters most — and the bag it goes in goes by a lot of names. 3.5g mylar bags, 3.5 bags, 3.5 mylar bags, 8th packs, eighth packaging: they all describe the same format, a smell-proof pouch built to hold 3.5 grams (one-eighth of an ounce) of flower. This guide breaks down what the format is, why it rules the shelf, and how to pick the right one.

Why the eighth dominates the shelf

The eighth is the highest-velocity flower unit in nearly every legal U.S. market. It sits in the sweet spot of dispensary basket sizes — affordable enough for repeat buyers, substantial enough to feel like value — which is why it drives a large share of flower revenue. For a brand, that means your 3.5g bag is the packaging most customers actually hold, inspect, and judge your product by.

What makes a quality 3.5g bag

  • Multi-layer barrier. A real mylar bag laminates an outer print layer, a middle foil layer, and a food-grade inner layer. The foil is what makes it smell-proof and shelf-stable.
  • Thickness. Premium bags run 140–180 micron — noticeably heavier than the 50–100 micron bags common in cheap import lots. Customers read weight as quality.
  • Child-resistant closure. Most legal states require ASTM D3475-certified CR packaging for retail flower. Look for certification, not just a zipper.
  • Resealable & tamper-evident. A zipper for reuse; a heat-seal or tear notch for first-open evidence.

3.5 bags vs. other sizes

The same construction scales up to quarter-ounce (7g), half-ounce (14g), and ounce (28g) formats, and down to 1g pre-roll bags. But the eighth is where most brands concentrate their packaging budget — because it's where most units move.

Stock vs. custom

Stock 8th packs ship fast and let you launch with professional packaging today — ideal for testing designs or running multiple strains. Custom-printed runs make sense once you have a locked brand identity and need volume. Many brands start with stock and graduate to custom.

Ready to browse? See the full range of 3.5g mylar bags — every style and finish, shipped from California.

Back to blog