Suffocation warning label requirements for poly bags
Ship a product in a large plastic bag and, somewhere on that bag, you almost certainly need a suffocation warning. Here is when it is required, what it has to say, how big it has to be — and where to confirm the exact current spec, because the rule is set by your sales channel, not by you.
THE SHORT ANSWER
A plastic poly bag generally needs a printed suffocation warning once the bag opening reaches a certain size — commonly published as 5 inches (about 127 mm) or larger, measured across the mouth when the bag is laid flat. The warning tells caregivers to keep the bag away from babies and children. The exact threshold, the required wording, and how the type size scales with bag size are set by your sales channel — most visibly Amazon — and, for some bag types, by state law, so confirm the current spec before you print. The essentials:
- The trigger is the bag opening size, not the product inside — commonly 5 inches or more (verify against Seller Central).
- The text uses a widely-standard wording that starts To avoid danger of suffocation… (verify the exact required wording).
- Larger bags generally require larger warning type, on a tiered scale the channel publishes.
- The warning can be printed on the bag or applied as a separate label.
- There is no single federal US law mandating it on every bag — the requirement usually comes from the marketplace or a state statute.
Requirements and fees change. This page was last verified against Amazon Seller Central on 18 July 2026. Always confirm the current version in Seller Central before you rely on it. This is general guidance, not legal or compliance advice.
When does a poly bag need a suffocation warning?
The trigger is the size of the bag opening — not what is inside it. A small parts bag rarely needs a warning; a large mailer or a bag big enough to fit over a child's head does. The rule most sellers work to is the one Amazon publishes for units sent to its fulfillment centers, and it is stated the same way across the industry: a poly bag with an opening of 5 inches or more (measured across the mouth when the bag is laid flat) generally requires a suffocation warning. That figure is commonly published and stable, but it is still a spec the channel sets — verify the current threshold in Amazon Seller Central before you commit to a print run.
Everything about a compliant poly bag hangs together, so it helps to see this warning as one line item in a longer bag spec. Our companion piece on Amazon FBA poly bag requirements walks the rest — transparency, thickness, a scannable barcode, and full sealing. Here is how the warning requirement itself breaks down, and where each detail actually lives:
| Requirement | The commonly-published rule | Where to confirm the exact value |
|---|---|---|
| When a warning is required | Bag opening about 5 in (127 mm) or larger, measured flat | Amazon Seller Central; any applicable state law |
| Warning wording | The standard To avoid danger of suffocation… text | Seller Central / the retailer's spec |
| Warning type size | Scales up in tiers as the bag gets larger | The channel's warning-size table |
| Where it prints | Printed on the bag or on an applied label | Your bag or label supplier |
| Who requires it | Marketplace plus some state laws — no single federal mandate | The channel + a compliance advisor |
Every "exact value" column points somewhere else on purpose: the shape of the rule is stable and safe to design around, but the specific numbers are the channel's to set and change. Treat the 5-inch figure as your working assumption and confirm it — do not hard-code it and forget.
The standard suffocation warning wording
There is a widely-used, near-universal warning text, and most channels accept it. The commonly-published wording reads, in substance: Warning: To avoid danger of suffocation, keep this bag away from babies and children. Do not use this bag in cribs, beds, carriages, or playpens. This bag is not a toy. You will see minor variations — some drop the last sentence, some add it, some markets require the message in more than one language — but the opening phrase is the constant that a warning is recognized by.
Because the wording is the part most likely to be graded exactly, treat it as a cite-don't-guess field. Amazon and other retailers publish the precise required text, and it is short enough that copying it verbatim from the source is the safe move. Confirm the exact current wording against Seller Central (or your retailer's supplier portal) rather than re-typing it from memory.
How warning size scales with bag size
A warning nobody can read protects nobody, so the second half of the rule is about legibility: the minimum type size for the warning generally goes up as the bag gets bigger. Most published requirements express this as a tiered table — bands of bag length paired with a minimum font size for the warning — so a small qualifying bag needs a smaller minimum than a large mailer.
This is the classic place to get burned by a stat you half-remember. We will not print specific point sizes here — they are exactly the kind of value a channel adjusts, and a wrong number on 10,000 printed bags is an expensive mistake. The logic to design around is simple and stable — bigger bag, bigger minimum type — and the figures live in the channel's warning-size table. Match your bag's longest dimension to the right band, and set the type at or above that minimum.
- Find your bag's size band in the channel's published warning-size table.
- Set the warning at or above the minimum type size for that band — never below.
- Keep it high-contrast (dark type on a clear or light area) so it stays legible on a transparent bag.
- Re-check the table on reorders — a spec that was compliant last year may have moved.
Who actually requires it: marketplace, state, and federal
It is worth being honest about where this obligation comes from, because sellers often assume it is a single federal law and it is not. In the United States there is no one federal statute that mandates a suffocation warning on every poly bag. Instead the requirement reaches you through two other doors:
- Your sales channel. Marketplaces and fulfillment programs — Amazon most visibly, and Walmart's WFS among others — require the warning as a condition of selling through them. This is contractual, enforced at intake, and it is why most sellers meet the warning rule at all.
- State law. Several US states have plastic-bag warning statutes that apply to bags above certain dimensions or thicknesses. Which states, which bag types, and which thresholds vary — so this is a verify-for-your-situation question, not a number to quote.
The federal consumer-safety body, the U.S. Consumer Product Safety Commission (CPSC), governs children's product and choking hazards broadly, but the poly-bag warning as sellers experience it is driven mostly by the marketplace and by state statutes. This article is part of our guide to packaging requirements by sales channel, and the through-line holds here: the same bag can face different rules depending on where it sells. None of this is legal advice — for a binding read on your products, talk to a compliance professional.
Printing the warning: on the bag or a separate label
There are two clean ways to put the warning on a poly bag, and both are accepted as long as the result is legible, correctly worded, at the required size, and visible:
- Printed on the bag. The warning is part of the bag's artwork, printed at conversion (usually flexo). This is the lowest per-unit cost at volume and looks the most intentional, but it bakes the warning into the bag order — so the copy, the type size, and the print registration all have to be right before the bags run. If the warning shares the bag with brand art, treat it like any printed panel and mind bleed and keep-clear margins. Our label dieline and bleed specs guide covers the same mechanics for the label case.
- A separate applied label. The warning is its own small pressure-sensitive label stuck to the bag. This is the fast, flexible route — especially if you already have plain bags in stock, or if you sell the same product into channels with different warning rules and want to apply the right one per lane.
Neither is more "correct" than the other. Printed-on wins on unit cost and finish at scale; a separate label wins on speed and flexibility. Pick based on run size, whether the bags already exist, and how much your warning spec might change between channels.
Sizing and placing your warning label
If you go the separate-label route, the label size is driven from the inside out: the required minimum type size sets how much room the wording needs, and the label has to be at least big enough to carry that text legibly with a little breathing room. Do not shrink the type to fit a smaller label — size the label to the type. The same wrap-and-panel method used for any container applies here; our guide to label size for any container and the free label size calculator will do the geometry for you.
Placement matters as much as size. Put the warning on a face where a caregiver would actually see it — not buried in a seal, folded into a gusset, or hidden under the product. On a transparent bag, keep the type on a light or opaque area so it does not disappear against whatever shows through, and keep it clear of a barcode's quiet zone. When you are prepping units for a fulfillment channel, our free FBA prep checker flags the warning alongside the other bag requirements so nothing gets missed at intake.
How PackOS handles warnings and labels
PackOS quotes and produces the bags and labels this warning lives on, so the requirement is handled at spec time — not at the fulfillment center's inbound dock. When you build a poly bag or a warning label, the spec captures the wording, type-size band, and placement, and the proof shows the warning in register on the actual artwork before anything prints. Because it is parametric, changing the bag size reflows the panel and flags when the warning band should move up. See how the detection and proof pipeline works on the technology page, or price a real bag or label on Quick Quote. Whatever you print, confirm the current threshold, wording, and type-size table in Amazon Seller Central (or your retailer's portal) first — that is the one step this guide cannot do for you.
Frequently asked questions
Does every poly bag need a suffocation warning?
No. The warning is generally required only once the bag opening reaches a certain size — commonly published as about 5 inches or more measured across the mouth when the bag is laid flat. Smaller bags usually do not need it. Because the exact threshold is set by your sales channel and can change, confirm the current rule in Amazon Seller Central or the applicable retailer or state requirement before you print.
What is the standard suffocation warning wording?
The most widely used wording starts with the phrase to avoid danger of suffocation, keep this bag away from babies and children, and adds that the bag should not be used in cribs, beds, carriages, or playpens and is not a toy. Variations exist, and some channels or markets require slightly different or bilingual text, so verify the exact required wording against your channel's current specification before printing.
Does the warning text have to get bigger on bigger bags?
Generally yes. Most published requirements scale the minimum warning type size up in tiers as the bag gets larger, because a larger bag is a larger suffocation risk and the warning has to stay legible. The exact font sizes for each bag-size band are published in the channel's warning-size table, so read the current figures there rather than guessing.
Can I print the suffocation warning as a separate label instead of on the bag?
Yes. The warning can be printed directly on the poly bag as part of the bag artwork, or applied as a separate pressure-sensitive label. Both are acceptable as long as the warning is legible, correctly worded, at the required size, and placed where it can be seen. A separate label is often the faster route when you already have plain bags in stock.
Is the suffocation warning required by law or just by Amazon?
Both can apply. There is no single federal United States law that mandates a suffocation warning on every poly bag, but several states have plastic-bag warning statutes, and marketplaces such as Amazon and Walmart require the warning as a condition of selling through their fulfillment programs. Check both the channel requirement and any applicable state law for your situation, and treat this as general guidance rather than legal advice.