Pre-roll tube sizing and compliance: paperboard tubes, CR caps and state rules
Size a pre-roll tube to the finished roll: our 0.75 by 4.5 inch paperboard tube takes a standard single pre-roll or a 0.5 gram cartridge, the 1 by 4.5 takes a king size or a 1 gram cartridge, and 1.5 and 2 inch diameters take three to seven rolls. Where your state requires child resistance, the round tube takes a push-and-turn cap tested to 16 CFR 1700.20; the slip lid is not child resistant. Packaging rules for cannabis are set state by state, so confirm the closure, opacity and label text with your regulator before you print.
One thing first, because it changes the rest of this guide. The Tria pre-roll and vape tube is paperboard: a spiral wound round tube with a 0.04 to 0.06 inch wall, or a square tube folded from 20pt SBS. We do not make polypropylene pop-top tubes, glass tubes or metal tubes. If your standard operating procedure calls for a plastic tube, that is a different supplier. If you want to move off plastic onto a printed paper tube that still passes the child-resistant test, read on.
This is packaging guidance, not legal advice. We reserve the panels and size the label area; the wording and the rule you are meeting are yours to confirm with your state regulator or compliance adviser.
Tube sizes and what fits
Measure the longest finished roll you sell, filter tip and twist included, and the widest point of the cone. Then pick the tube by diameter first and length second. These are the sizes we run, and any size from 0.5 by 2 to 3 by 6 inches can be made to order.
| Tube (diameter by length) | Fits | Closure options |
|---|---|---|
| 0.75 x 4.5 in | One standard pre-roll, or a 0.5 g cartridge in a cradle | Slip lid, or CR push-and-turn cap on the round tube |
| 1 x 4.5 in | One king size pre-roll, or a 1 g cartridge | Slip lid, or CR push-and-turn cap on the round tube |
| 1.5 x 4.5 in | Three to five pre-rolls with a paperboard divider | Slip lid, or CR cap on the round tube |
| 2 x 4.5 in | Five to seven pre-rolls with a divider | Slip lid, or CR cap on the round tube |
| 1 x 2.5 in | A cartridge on its own, short format | Slip lid, or CR cap on the round tube |
Leave a little headroom. A roll that touches the lid gets its twist crushed every time the tube is closed, and a roll with too much space rattles and sheds. If your rolls vary by a few millimeters from batch to batch, size to the longest and let the shorter ones sit loose; we would rather that than a tube some rolls do not fit.
Round or square is a real decision. A round spiral wound tube feels like a cigar tube in the hand and is the only one that takes the child-resistant cap. A square tube on 20pt SBS ships flat, prints on four flat sides and costs less to freight, but it closes with a tuck only. For a single pre-roll in a market that requires child resistance, use round with the CR cap. For a five-pack of hemp pre-rolls where child resistance is not required, square is the better shelf box.
What child resistant actually means here
A package is child resistant when it passes the federal test protocol in 16 CFR 1700.20: panels of young children try to open it and panels of adults must be able to open it. Cannabis itself is not covered by the federal Poison Prevention Packaging Act, so the requirement comes from your state, and states that require child resistance commonly accept packaging certified to that federal protocol. California's Department of Cannabis Control is one example; it lists packaging tested under the federal act as an accepted form of child resistance.
Two details catch people out. First, a pass covers one tube and cap combination. Change the cap, the tube diameter or the wall and the existing test data may no longer apply, so tell us before you change the spec. Second, California sorts products into single-use and lifetime child resistance. Pre-rolls and vape cartridges need single-use child resistance, and a single-use package must carry the line "This package is not child-resistant after opening." Edibles and tinctures need lifetime child resistance, which is a different closure job. The test documentation for our CR cap is available on request with the quote.
What to check with your state before you print
We do not publish a state-by-state matrix, because cannabis packaging rules change often and a stale cell is worse than no cell. These are the questions to put to your regulator, with California as a worked example where we have checked the current guidance.
| Requirement | What to confirm | California, as of this review |
|---|---|---|
| Child resistance | Is it required on the tube itself, or can an exit bag satisfy it? | Required on the product package; pre-rolls need single-use CR with the not child-resistant after opening line |
| Opacity | Must the tube hide the product? | Opaque packaging is required for edible products; check current rules for pre-rolls with your regulator |
| Universal symbol | Which symbol, what size, which panel? | State-specific symbol; artwork comes from the regulator |
| Warning text | Exact wording and minimum type size | Set by state rule; supply it to us verbatim |
| Batch and testing label | How much space for the lab and batch sticker? | Reserve a flat panel or a label area on the wrap |
Opacity is where the old version of this page went wrong, so to be plain: in California the opaque packaging rule applies to edibles. Our board is opaque anyway, so a paper tube satisfies an opacity requirement wherever one applies. If you want a window, that is a different product, such as the child resistant mylar bag, which can take one where the state allows it.
Freshness: a tube is not a barrier
A paperboard tube stops a pre-roll being crushed. It does not stop it drying out. If the rolls will sit for more than a few weeks between packing and sale, put each roll in a sealed barrier sleeve inside the tube, or add a humidity pack to the five-pack. For flower sold by weight, skip the tube and use a barrier bag.
Hemp pre-rolls and the federal definition change
If you sell hemp pre-rolls rather than state-licensed cannabis, watch the calendar. A 2025 appropriations law, Public Law 119-37, rewrites the federal definition of hemp to count total THC, including THCA, and caps finished products at 0.4 mg of total THC per container. A September 2026 law, H.R. 6500, moved most of that change to December 11, 2026; the exclusion of cannabinoids that the plant cannot produce naturally still applies from November 12, 2026. A product that no longer meets the definition is no longer federal hemp, and the packaging rules that apply to it change with it. Talk to your counsel before you print a long run of hemp pre-roll tubes this year.
An illustrative spec
Illustrative spec, not a client order. A licensed brand launching single pre-rolls in a state that requires child resistance: 1,000 round tubes at 1 by 4.5 inches, kraft board with a printed paper wrap in two spot colors plus the state symbol in black, CR push-and-turn cap, a flat label zone on the back of the wrap for the batch sticker, and the not child-resistant after opening line set in the warning panel. Expect 10 to 14 business days after proof. If the brand also sells a five-pack, a 1.5 by 4.5 inch round tube with a paperboard divider uses the same wrap artwork and the same cap family.
For packs of empty cones rather than filled rolls, the cone sleeve is the right format. For a pre-roll multipack sold in a carton, or for jars of flower, look at the hemp product box. For cartridges sold on their own in a carton rather than a tube, see the vape cartridge box.
Sources
- 16 CFR 1700.20, testing procedure for special packaging (eCFR)
- California Department of Cannabis Control, child-resistant packaging guidance
- California Department of Cannabis Control, labeling checklist for manufactured products
- H.R. 5371, enacted as Public Law 119-37, section 781 (Congress.gov)
- H.R. 6500, delaying most hemp definition changes to December 11, 2026 (Congress.gov)
Rules checked against these sources on October 5, 2026. Regulations change; check the current text before you print.
Questions people ask
What size tube does a standard pre-roll need?
A standard single pre-roll fits our 0.75 by 4.5 inch tube, and a king size fits the 1 by 4.5 inch tube. Measure your longest finished roll including the filter and twist, then pick the diameter first and the length second. Three to five rolls go in a 1.5 by 4.5 inch tube with a divider, and five to seven in a 2 by 4.5 inch tube.
Is a paperboard pre-roll tube child resistant?
With the push-and-turn cap, yes. The round tube and cap combination is tested to 16 CFR 1700.20, and the test documentation is available on request. The paper slip lid version is not child resistant and suits hemp products and markets that do not require it. The square folded tube takes a tuck closure only.
Does California require pre-roll tubes to be opaque?
In the current Department of Cannabis Control guidance we checked, the opaque packaging rule applies to edible cannabis products. Pre-rolls need single-use child-resistant packaging labeled with the line that it is not child resistant after opening. Our paperboard is opaque either way. Confirm the current rule with the regulator before you print.
Does a paper tube keep a pre-roll fresh?
No. Paperboard protects the roll from crushing but is not a moisture barrier. For anything that will sit more than a few weeks, seal each roll in a barrier sleeve inside the tube or add a humidity pack to a multipack.
Can Tria make plastic pop-top pre-roll tubes?
No. Our pre-roll tube is paperboard only, round or square. We do not make polypropylene, glass or metal tubes. If you need a plastic tube for a specific state program, that is a different supplier.
Should I use a pre-roll tube or a cone sleeve?
Use the pre-roll tube for one to five filled pre-rolls, where the tube protects a finished product and can take a child-resistant cap. Use the cone sleeve for a bundle of empty, unfilled cones sold as an accessory; it is a flat paperboard sleeve from 300 units and has no child-resistant closure.