Amazon FBA packaging requirements, in plain language

Requirements and fees change. This page was last verified against Amazon Seller Central on 18 July 2026. Always confirm the current version in Amazon Seller Central before you rely on it. This is general guidance, not legal or compliance advice.

What Amazon FBA packaging is really asking for

Fulfillment by Amazon (FBA) is a promise Amazon makes to the buyer: the unit will be stored, picked, packed, and shipped without a person having to figure out how to handle it. Everything in the packaging rulebook exists to keep that promise. A unit has to survive a warehouse — dropped into a bin, slid down a chute, stacked under other products — and it has to be identifiable by a single scan. If it can't do both, it gets flagged, held, or billed back to you as an unplanned service.

So the requirements come down to two questions. First, is the unit protected — sealed, bagged, boxed, or cushioned so it and its neighbors arrive intact? Second, is the unit identifiable — does it carry a scannable barcode that ties it to your listing? Almost every specific rule is a detailed answer to one of those two. This article is part of our guide to packaging requirements by sales channel, because the same product often needs different packaging on Amazon than it does in a store or a direct-to-consumer parcel.

Who preps your units now

For a long time Amazon offered a paid prep service in the US: you could ship units in, and Amazon would bag, label, or bubble-wrap them for a per-unit fee. Amazon has scaled that back, which means prepping units to spec is increasingly the seller's job — done in-house, by your co-packer, or by a third-party prep center before the shipment ever reaches a fulfillment center. Which prep services Amazon still performs on your behalf can change, so confirm what's currently available to your account in Seller Central rather than assuming.

The practical upshot: it pays to design prep into the product from the start. If a SKU is going to need a poly bag and a warning label anyway, it's cheaper and cleaner to build that into the packaging spec than to bag thousands of units by hand later. That's the same logic behind SIPP and SIOC packaging, where a product ships in its own certified container with no over-box at all.

Prep requirements by product type

Amazon's prep guidance is organized by what the product is. The table below is a general map of the common prep for each family — not a substitute for the live requirement, which you should read for your exact category in Seller Central. Think of it as knowing what questions to ask before you get to the fine print.

Product type	Common prep (general)	Where to verify
Loose / exposed items	Sealed in a transparent poly bag with a scannable barcode; suffocation warning if the bag opening is large enough	Seller Central poly-bag & packaging guidance
Fragile / glass	Bubble-wrapped or otherwise cushioned so it survives a drop and doesn't damage neighbors	Seller Central fragile-item prep
Liquids	Sealed to prevent leaks, often bagged as a secondary containment	Seller Central liquids prep
Sharp / protruding	Contained or capped so it can't puncture other units or injure a handler	Seller Central sharp-item prep
Sold as a set / multipack	Marked clearly as one unit — e.g. "sold as set, do not separate" — so it isn't split and mis-picked	Seller Central set & bundle guidance
Boxed items	Fully enclosed in a six-sided box that stays closed under moderate pressure	Seller Central boxing guidance

Two of these rows have their own deep dives: poly-bagged units follow the Amazon FBA poly bag requirements, and any bag large enough to pose a hazard needs a suffocation warning label. Both are covered below and in full in those guides.

Poly bags, sealing, and the suffocation warning

The poly bag is the workhorse of FBA prep, and it carries the most-cited rules. A compliant bag is generally transparent (so the unit and its barcode are visible), meets a minimum thickness, is fully sealed with no loose opening, and — on larger bags — carries a printed suffocation warning. We're deliberately not printing the exact thickness in mils or the exact warning font size here, because Amazon sets those and updates them: read the current numbers in Seller Central before you spec the film.

The one threshold worth committing to memory is the warning trigger. It is commonly published — and you should verify it against Seller Central — that poly bags with an opening of 5 inches or more require a suffocation warning. The standard wording most sellers use is the familiar "To avoid danger of suffocation, keep this bag away from babies and children…" text; confirm the exact required wording and the size it must be printed at, since larger bags generally call for a larger warning. Your barcode also has to remain scannable through or on the bag, which is why transparency and label placement are part of the same decision.

Tamper-evident — packaging or a seal that visibly shows if a unit has been opened or interfered with, so a buyer or a fulfillment center can tell the product is still intact. See more terms in the packaging glossary.

Because a poly bag with a printed barcode and warning is itself a flexible-packaging and label job, it's something PackOS can spec and quote directly. If you're printing your own bags, treat the film, the seal, and the warning as part of the artwork, not an afterthought.

Labeling: FNSKU and barcode placement

Every FBA unit needs to resolve to a single, scannable barcode. Most sellers use an FNSKU — the Amazon-specific barcode that ties a physical unit to your exact listing in the fulfillment network. The general rules are stable and worth knowing:

• The FNSKU must be scannable — printed at adequate size and contrast, on a flat, uncovered surface.
• It should cover or replace any other scannable barcode on the unit (a manufacturer UPC/EAN), so the warehouse never scans the wrong code.
• It needs to sit where a picker can find it without opening or reorienting the product.
• For sets and multipacks, only the outer unit is labeled — the pieces inside are not scanned individually.

The precise placement, format, and any exceptions (for example, categories eligible for virtual/transparency tracking) are defined by Amazon, so confirm your product's labeling path in Seller Central. Getting the label right is the same discipline as getting a shelf barcode right anywhere else: adequate quiet zone, no varnish or curvature killing the scan, and the code on a face that stays flat.

Boxing units in and the size and weight limits

Individual units go into a shipping box to travel to the fulfillment center, and that box has its own rules. Amazon publishes size and weight limits for inbound boxes, with heavier-item exceptions and required team-lift or heavy markings above certain thresholds. Those exact inch-and-pound figures change, so we won't state them as fact — the current limits live in Seller Central, and going over them is a common cause of flagged or surcharged shipments. We cover this in depth in FBA box size and weight limits.

The engineering lesson is the same one that governs any freight lane: right-size the box and spec the board to the load it will actually carry, derated for stacking and humidity. A master carton that's too light crushes; one that's too big wastes cube and invites damage. If you're designing a shipper to survive Amazon's handling and earn the frustration-free benefits, that's the territory of SIPP and SIOC and of getting the corrugated grade right the first time.

What Amazon charges for prep and packaging

Amazon publishes a fee schedule that includes prep services (where still offered), per-unit labeling, and other packaging-related charges. We do not quote dollar figures here on purpose — Amazon changes them, and a number that's right today is misleading next quarter. The reliable move is to check the current prep and packaging fees in Seller Central and price them into your unit economics before you commit to a prep approach.

The strategic point is that fees reward doing prep upstream. If you arrive with units already bagged, labeled, and boxed to spec, you avoid the per-unit charges Amazon applies to work it has to do for you — and the holds and non-compliance fees that come from getting it wrong. Building the poly bag, the warning, and the FNSKU into the packaging spec is usually cheaper per unit than fixing it at the dock.

This is where PackOS fits: it treats the channel rules as part of the spec, so a bag that needs a warning or a label that needs to scan is caught at quote and preflight time, not after a pallet is already built. You can see how that spec-and-check step works on the technology page.

The fastest path to prep-ready

The most efficient way through all of this is to classify the unit once and let a checklist carry the rest. In broad strokes, the self-prep sequence is:

1. Classify the unit — loose, fragile, liquid, sharp, boxed, or a set — to know which prep applies.
2. Protect it — poly-bag, box, or cushion per the type, and seal it securely.
3. Add the warning — a suffocation warning if the bag opening is large enough.
4. Label it — apply the FNSKU so it scans and covers any other barcode.
5. Box and mark the shipment — pack into a shipping box within Amazon's size and weight limits, with box labels.
6. Verify each step — confirm every rule against Seller Central for your category before you ship.

For a walk-through you can follow unit by unit, use the Amazon FBA prep checklist, and run your product through the free FBA prep checker to see which of these steps your SKU actually triggers. When the prep involves a printed bag, a warning, or a scannable label, PackOS can spec and quote that packaging directly — so the compliance is designed in, not bolted on.