Dimensional Weight and Basic Shipping Information

Updated 1 year ago by Adi G

While you're adding products to your box during Box content process (Be it within Accelerlist or FBABoxcontent.com ), we highly recommend filling the box to the top, yet limit the weight upto 50 lbs.

This is one of the most efficient ways to manage box content, as a filled box primarily helps you get recognized as a serious seller by Amazon (over someone who has a half-filled box) and the 50lbs weight limit helps you to remain in the optimal shipping package category as a seller.

Here are a few steps for efficient shipping:

A: Determine Package Size and Weight

Amazon charges a seller for dimensional weight instead of the package's unit weight.

First determine which size tier your package falls into.

The table shows the maximum weights and dimensions for each tier.

FBA size tier


Longest side

Median side

Shortest side

Length + girth*

Packaging weight

Small standard

12 oz





4 oz

Large standard

20 lb





4 oz

Small oversize

70 lb





16 oz

*Girth is a unit measure, equivalent to 2 x (median side + shortest side)The size tier is important because it determines the packaging weight and your fees. As shown in the table:

  • Standard-size packages have 4 oz of packaging weight.
  • Oversize packages have 16 oz of packaging weight.

B: Determine Billing Weight

Now that we know the packaging weight, we add it to either the package’s specific unit weight or its dimensional weight, whichever is greater. This gives us the billing weight.

  • We use unit weight (the item’s actual weight) for all standard-size packages that weigh less than 1 lb, as well as for all special oversize packages.
  • We use dimensional weight if it is greater than the unit weight for all other size tiers. Dimensional weight is calculated in inches as length times width times height, divided by 139

C: Calculating Fees

Finally, we add the packaging weight from step 1 to the billing weight from step 2 and round up to the nearest pound. The rate is a function of the size tier and weight. For more information, go to FBA fulfillment fees for Amazon.com orders on Seller Central.

While these are the basics of it, you can always consult Seller Central while you're getting setup and doing box content for the first time, or if you have any queries.

Additional Notes:

  • When many sellers offer the same product, random samples are measured. The fulfillment fee for that product’s size tier is based on the packaging attributes of these samples.
  • Package dimensions help determine fulfillment fees. To reduce variation and avoid unnecessary fees, always pack soft items tightly.
  • Anything that sticks out of your package could move you into a higher size tier, so you can avoid higher fees by making sure no packing material, tape, or other items are sticking out of your package.
  • Fulfillment and storage fees vary between peak and off-peak periods.

(You can also refer to articles by Amazon about FBA Fulfillment fees and Product Size Tiers .)

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