Short answer: cannabis flower is sold by weight, in a hybrid of metric and imperial units. A gram is the smallest common amount, an eighth is 3.5 grams (one-eighth of an ounce), a quarter is 7 grams, a half is 14 grams, and an ounce is 28 grams. Almost every quantity you'll see on a menu is one of these, and per-gram price drops as the quantity goes up.
If you're new to buying flower, the vocabulary can feel like a secret handshake. It isn't — it's just fractions of an ounce with nicknames. Here's the full breakdown, what each amount actually gets you, and how to decide what to buy.
The Standard Weights, Decoded
Cannabis inherited a strange measuring system: flower is priced in metric grams but bundled in imperial ounce fractions. The result is this ladder:
| Name | Weight | Fraction of an ounce |
|---|---|---|
| Gram | 1 g | 1/28 |
| Eighth | 3.5 g | 1/8 |
| Quarter | 7 g | 1/4 |
| Half (half-ounce) | 14 g | 1/2 |
| Ounce ("zip") | 28 g | 1 |
Technically an ounce is 28.35 grams, but the industry rounds to 28 — so an eighth is really 3.54 grams sold as 3.5. Nobody's shorting you; it's a rounding convention the entire market shares.
What each amount looks like in practice
A gram is one to two average joints, or a few bowls. It's the sample size — enough to try a strain without committing.
An eighth (3.5 g) is the most popular purchase in cannabis, and for good reason: enough to actually get to know a strain, small enough to stay fresh. Figure roughly three to five joints, or a week-plus of occasional sessions.
A quarter (7 g) suits regular consumers who've found a strain they like. The per-gram price usually improves noticeably at this tier.
A half (14 g) and an ounce (28 g) are stock-up territory. An ounce — long nicknamed a "zip" — is the standard bulk unit, and in most legal states it's also near the personal possession limit, so it's typically the largest quantity sold at once. Note that hemp and marijuana rules differ here; see how the two categories split in Hemp vs. Marijuana: What's Actually the Difference?
Why Bigger Quantities Cost Less Per Gram
Flower pricing works like most goods: buying in bulk is cheaper per unit. A gram might run $10–15 while an ounce of the same flower works out to $5–8 per gram. Packaging, labeling, and handling costs are roughly fixed per unit sold, so larger quantities spread those costs thinner.
That's also the logic behind tiered bundles. Pairing quantity discounts with quality tiers — bulk smalls at value pricing, hand-selected premium buds, top-shelf frosted flower — lets you match both your budget and your standards. The size-versus-quality distinction trips up a lot of buyers, so we wrote Smalls vs. Premium Buds: What Are You Actually Paying For? to untangle it: smalls are smaller buds of the same flower, not worse flower.
One warning about shopping on price alone: a cheap ounce of poorly grown, poorly tested flower is no bargain. Check the lab results whatever the quantity — How to Read a Certificate of Analysis shows you what to look for — and remember that potency percentage isn't the whole story either, as we cover in What Is a Good THCA Percentage?
How Much Should You Buy?
Match the quantity to your pace, not your wallet's ambition. Flower is a perishable product: terpenes evaporate, buds dry out, and character fades with air, light, and time.
Buy a gram or an eighth if you're trying a new strain, you consume occasionally, or you like variety. Fresh beats bulk when you smoke slowly.
Buy a quarter or half if you have a proven favorite and a consistent routine. You'll hit the better per-gram pricing without sitting on months of inventory.
Buy an ounce if you consume regularly and store properly. An ounce kept in a sealed glass jar away from light and heat holds up well; an ounce left in a plastic bag on a windowsill doesn't. Storage is the difference — our guide on How to Store THCA Flower covers jars, humidity packs, and what actually degrades flower.
Reading a Menu Like a Regular
A few conventions worth knowing. Prices are usually listed per quantity, not per gram — do the division to compare fairly across sizes and brands. "3.5g" and "eighth" are the same thing. Pre-rolls are sold individually by gram weight and cost more per gram than loose flower — you're paying for the rolling. And weight tells you how much, never how good: two eighths can sit at very different quality tiers depending on genetics, growing environment, and trim. That quality side of the equation is its own topic, covered in Indoor vs. Greenhouse vs. Outdoor Flower.
You can see the ladder in action on our Flowerz collection, where strains are listed with weight options and published lab results side by side.
The Bottom Line
Five names, five weights: gram (1 g), eighth (3.5 g), quarter (7 g), half (14 g), ounce (28 g). Per-gram price falls as quantity rises, but freshness and quality — not bulk math — should drive the decision. Buy at the pace you consume, store it properly, and always check the lab report before the price tag.
Chubby Smoke products are lab-tested and intended for adults 21+. This article is educational and is not legal or medical advice. These statements have not been evaluated by the FDA.
