Guide · FBA inbound · Reviewed 2026
Amazon FBA box size limits
US Amazon FBA box size and carton limits sellers check before sealing inbound shipments — plus AWD carton vs unit rules for 2026, and a free Pass/Fail tool.
Check cartons (and optional AWD units) against current limits in your browser.
Open FBA Box Size CheckerCommon US FBA inbound carton limits
- Max length: 36 in (longest side) — Official / platform guidance (FBA US length change Jun 20, 2025; SC notices)
- Max width / height: 25 × 25 in — Official / platform guidance (SC packaging)
- Max weight (standard path): 50 lb — Official / platform guidance
- Guide minimum: about 6 × 4 × 1 in (~1 lb) — Industry / receiving guidance (warn, not always a hard published cube)
AWD carton vs AWD unit (Jul 31, 2026)
Do not confuse carton outer size with unit/SKU eligibility.
- AWD carton (outer): commonly still cited as ≤ 25 × 25 × 25 in and 50 lb — Platform / dual-program packaging guidance (confirm SC)
- AWD unit (from Jul 31, 2026): new US AWD inbounds generally require sortable units smaller than 18 × 14 × 8 in and under 20 lb — Official / platform product-requirements notices (2026)
Passing a carton check does not prove the SKU is still AWD-eligible after the 2026 change. Use the optional unit fields in theFBA Box Size Checker when you ship to AWD.
Weight exceptions & packaging
- Over 50 lb: standard path fails. A single oversized/heavy unit may sometimes continue with Team Lift labels; some help texts cite ~65 lb / ~30 kg as an upper band; over 100 lb often needs Mechanical Lift — Platform guidance + exception notes (confirm SC; not auto-approved by our tool)
- Carton strength: RSC, adequate flute (often B), ECT-32 / ~200 psi class when the load needs it — Industry / packaging practice (common FBA prep guidance)
FAQ
What is the Amazon FBA box size limit?
For US FBA small-parcel inbound cartons, common limits are 36 inches on the longest side, 25 inches on the other sides, and 50 pounds (length updated Jun 20, 2025). Source: Amazon Seller Central US packaging notices — confirm for your shipment.
What are standard FBA box dimensions?
Think of FBA box dimensions as up to 36 × 25 × 25 inches after sorting sides so the longest edge is length. Undersized cartons can also cause receiving issues.
Is AWD the same as FBA box size?
No. AWD inbound cartons are often capped at 25 × 25 × 25 inches and 50 lb while FBA allows longer length. Separately, from Jul 31, 2026, new US AWD inbounds generally need sortable product units smaller than 18×14×8 in and under 20 lb.
What are the new AWD box limits starting July 31, 2026?
Amazon’s US AWD program restricts new inbound eligibility for oversized/large-bulky units from July 31, 2026. Individual units generally must be smaller than 18×14×8 inches and under 20 lb. That is a unit/SKU rule — carton outer limits remain a separate check. Confirm Seller Central AWD product requirements.
What is the minimum FBA carton size?
Guides often cite about 6 × 4 × 1 inches and roughly 1 lb as a practical minimum (industry / receiving guidance). Below that, Amazon may delay or reject receiving.
How do I check FBA carton size before shipping?
Enter L×W×H and weight in the free FBA Box Size Checker for instant Pass/Fail — nothing is uploaded. For AWD, you can also check unit (SKU) eligibility after Jul 31, 2026.
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