If you've ever looked at a pop-top bottle labeled "19 dram" and wondered exactly how much flower that holds — you're not alone. Dram sizes are one of the most searched and least clearly explained topics in cannabis packaging. This guide breaks it down completely: what a dram actually is, how each size maps to common cannabis weights, and which Dragon Chewer containers to reach for based on how you're packaging flower at your dispensary or brand.
What Is a Dram? The Quick Answer
A dram (abbreviated dr) is a unit of volume derived from the apothecary and fluid measurement systems used in pharmacy and medicine. One fluid dram equals approximately 3.7 milliliters (ml). In the cannabis packaging world, drams are used to measure the internal volume of pop-top bottles and similar rigid containers — not the weight of the product inside.
This is the key thing to understand: dram measures volume, not weight. A 19 dram bottle holds 19 drams of space. How much cannabis flower that space holds in grams depends on the density and moisture content of the flower. Loosely packed, fluffy flower takes up more space than dense, tightly trimmed buds — which is why most dram-to-gram conversions are given as approximate ranges rather than exact numbers.
That said, the cannabis industry has standardized around a practical set of dram-to-gram pairings that work reliably for most flower types. The chart below reflects those industry standards — and specifically the capacities used across Dragon Chewer's pop-top bottle lineup.
Dram Size Chart: Cannabis Flower Amounts at a Glance
| Dram Size | Volume (ml) | Flower Capacity | Common Use |
|---|---|---|---|
| 6 Dram | ~22 ml | 1 gram | Singles, edibles, small portions |
| 13 Dram | ~48 ml | ~2 grams | 2g pre-measured flower, infused products |
| 19 Dram | ~70 ml | 3.5 grams (⅛ oz) | Eighth — most popular dispensary size |
| 30 Dram | ~111 ml | 7 grams (¼ oz) | Quarter ounce flower |
| 60 Dram | ~222 ml | 7–14 grams (¼–½ oz) | Half-ounce, bulk flower, large edibles |
| 160 Dram | ~592 ml | 1 ounce (28 grams) | Full ounce, dispensary display, bulk |
Flower capacity is approximate and varies with bud density, trim style, and moisture content. These figures reflect typical dispensary-grade flower in standard conditions.
Each Size, Explained
6 Dram — The 1 Gram Single
The 6 dram pop-top is the smallest container in the standard cannabis dispensary lineup. At roughly 22ml of internal volume, it's purpose-built for 1 gram of flower — the entry-level purchase for patients and casual consumers. It's also a popular choice for small edible portions, pre-portioned concentrates, and sample or promo packaging.
Dragon Chewer's 6 dram pop-top bottles are available in a full range of opaque colors — red, orange, yellow, green, blue, black, white, and more — with child-resistant latch-top closures that meet CPSC standards. The compact size makes them easy to display, easy to grab at point-of-sale, and easy for patients to pocket. At this size, color-coding by strain or potency tier is a popular merchandising strategy for dispensaries.
13 Dram — The 2 Gram Mid-Size
The 13 dram sits between the 1g single and the classic eighth. With approximately 48ml of volume, it comfortably holds around 2 grams of flower — a size that's become more common as dispensaries create mid-tier price points between singles and eighths.
It's also a popular format for infused products, multi-piece edible portions, and any product that needs more space than a 6 dram but doesn't warrant the full size of a 19 dram. Dragon Chewer carries the 13 dram in a recycled ocean plastic (PCR) version for operators building a sustainability narrative around their brand.
19 Dram — The Eighth (Most Popular Size)
The 19 dram is the workhorse of cannabis flower packaging. At ~70ml, it holds 3.5 grams — exactly one eighth of an ounce — which is by far the most common cannabis retail weight across every regulated market in the country. If you're packaging eighths, this is your bottle.
Dragon Chewer's 19 dram pop-tops come in every major color and finish, in cases of 225 units. The child-resistant pop-top closure is the industry standard because it's easy for adult consumers to open (push-and-turn or squeeze-and-pop, depending on mechanism) while still meeting CR compliance requirements for cannabis retail packaging.
The 19 dram is also used by operators packaging 3.5g of edibles or concentrates — the math works the same whether it's flower or not, as long as the product density is in a similar range.
30 Dram — The Quarter Ounce
Step up to the 30 dram and you're in quarter-ounce territory. At ~111ml, this container holds 7 grams (¼ oz) of flower with room to spare for most bud densities. The 30 dram is a common format for dispensaries offering bulk flower at a value tier — quarters attract a different buyer than eighths, and the larger container communicates volume and value at a glance.
Dragon Chewer's 30 dram pop-tops are available in translucent and opaque color options, including translucent purple — a popular choice for dispensaries that want the product to be slightly visible through the container. The larger format also gives labels more surface area, which can be a real advantage for brands with detailed compliance labeling requirements.
60 Dram — Half Ounce and Beyond
The 60 dram is a large-format container built for dispensaries packaging 7 to 14 grams of flower — covering a quarter to a half ounce, depending on bud density. At ~222ml, it's also one of the most versatile sizes in the lineup: operators use it for bulk value flower, large edible portions, infused products, and anything where the 30 dram is simply too small.
Dragon Chewer carries the 60 dram in both standard opaque colors (baby blue, bubblegum pink, tiffany blue, and more) and as a recycled ocean plastic PCR version for eco-conscious packaging programs. The wide mouth opening on larger dram sizes also makes filling faster and more practical in a high-volume dispensary or processing environment.
160 Dram — The Full Ounce
At the top of the lineup sits the 160 dram — Dragon Chewer's largest pop-top flower bottle, built specifically for one full ounce (28 grams) of flower. The 160 dram has a large, wide mouth opening for easy access and filling, and it's designed for dispensaries offering bulk or wholesale ounce-level purchasing, high-volume medical patients, and operators packaging larger quantities of edibles or other products.
It's a bold, visible container on a dispensary shelf — the kind of format that communicates quantity and value without any words. If your operation sells ounces, the 160 dram is your standard.
Choosing the Right Dram Size for Your Operation
With six sizes spanning 1 gram to a full ounce, the right question isn't "which dram size is best" — it's "which sizes match how your customers buy."
Most dispensaries carry a core set of 3–4 sizes aligned with their most common purchase weights. A typical setup might look like:
- 6 dram — 1g impulse purchase and sample sizing
- 19 dram — eighth as the volume driver
- 30 dram — quarter ounce for regular buyers
- 60 dram — half ounce for heavy consumers and medical patients
Brands launching a premium product line often start with a single signature size — usually the 19 dram eighth, since it captures the most consumer purchases — and expand from there once the brand is established.
For operators also packaging edibles, concentrates, or other product categories in pop-top containers, the same dram sizing logic applies: match the container volume to your typical product weight, factoring in that non-flower products often have different densities than dried flower.
Glass Jars: A Dram-Free Alternative for Larger Quantities
For operations packaging larger flower quantities — or operators that prefer glass over plastic — Dragon Chewer's child-resistant glass jars offer a premium alternative to the pop-top format. Glass jars are sized in ounces rather than drams:
- 2 oz glass jar — approximately 56 grams capacity
- 3 oz glass jar — approximately 84 grams capacity
- 4 oz glass jar — approximately 112 grams capacity
Glass has specific advantages for premium and medical flower — it's non-porous, non-reactive, and preserves terpene profiles better than plastic over time. The straight-wall construction of Dragon Chewer's glass jars also makes label application clean and professional, a key consideration for brands investing in high-quality custom labels.
For concentrate packaging, 5ml and 6ml glass concentrate jars are the industry standard — not measured in drams, but holding approximately 1 gram of wax, shatter, rosin, or distillate.
Shop Dragon Chewer's Full Pop-Top Lineup
Dragon Chewer carries every dram size listed above — in 15+ colors, standard and PCR ocean plastic options, with child-resistant closures designed to meet CPSC compliance standards. Wholesale pricing starts at $0.07/unit, free shipping on eligible orders, no tariffs, no hidden fees.
New to Dragon Chewer? Request a free sample pack and we'll send you a curated selection of containers to hold in your hands before you commit to a bulk order. It's the fastest way to confirm sizing and quality before placing your first order.
- 📦 Browse all pop-top bottle sizes →
- 🔬 Shop child-resistant glass jars →
- 📧 Questions? Email sales@dragonchewer.com or call 661-206-7134
Mon–Fri, 8am–4:30pm PT. Local pickup available at our California and Oklahoma City distribution centers.