Product dimensions and volume
| Definition | Product dimensions and volume are measures of the product’s size when fully packaged and ready to ship in accordance with FBA policies and requirements. |
| Using this article | Product dimensions and volume are critical inputs to determining the product size tier. Along with product weight, dimensions are used to calculate a variety of FBA fees, including storage fees, fulfilment fees and returns processing fees. This article shows you how to determine the dimensions and volume of your items. |
| Fees that use this attribute |
Monthly inventory storage fees FBA inventory storage overage fees FBA removal & disposal order fees Fulfilment fees for Multi-Channel Fulfilment orders FBA Prep Service fees |
| Related terms |
Determine your product dimensions and volume
For new products, determine the dimensions and volume by measuring your fully packaged product.
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Measure the dimensions of a single unit of your product in centimetres:
- Longest side (length) – The dimensions of the longest side of the item.
- Median side (width) – The dimensions of the side that is neither the longest nor the shortest.
- Shortest side (height) – The dimensions of the shortest side of the item.
- Girth – The dimensions of the longest side plus 2 x median side plus 2 x shortest side. Formula: (length + 2x width + 2x height)
Note: These values are used to determine the product size tier for an item. -
Calculate the product volume in centimetres:
Product volume = longest side x median side x shortest side
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Convert the product volume from cubic centimetres to cubic feet for the UK. For the EU, convert from cubic centimetres to cubic metres.
Storage fees are based on cubic feet in the UK. To convert the product volume from cubic centimetres to cubic feet, divide the volume by 28,316.84 cubic centimetres (30.48 cm x 30.48 cm x 30.48 cm = 28,316.84), which is the equivalent of 1 cubic foot.
Storage fees are based on cubic metres in the EU. To convert the product volume from cubic centimetres to cubic metres, divide the volume by 1,000,000 cubic centimetres (100 cm x 100 cm x 100 cm = 1,000,000), which is the equivalent of 1 cubic metre.
Important: If a product is sold as a set, the weight and dimensions are the combined total of all of the items in the set packaged together.
For existing products, you can look up your product volume and dimensions.
If you have stored a product as FBA inventory, you can look up your product volume and dimensions using the Monthly Storage Fee report:
- Download the report
- Identify the product of interest by its FNSKU
- View the product volume in the item-volume field.
For products that are currently to be sold on Amazon but that you don’t sell yet, you can look up the product dimensions in order to calculate the volume using the Revenue Calculator:
- Search for the product
- View the Package dimensions values
- Use the formulas above to calculate the product volume and other dimensions
Example of product dimensions and volume calculation
Let’s say a unit measures 45 x 25 x 12 cm3:
Dimensions:
- Longest side (length): 45 cm
- Median side (width): 25 cm
- Shortest side (height): 12 cm
- Girth: ((25+12) x 2) + 45 = 119 cm
Volume:
- Product volume (cubic centimetres): 45 x 25 x 12 = 13,500 cubic centimetres
- Product volume (cubic feet): 13,500 / 28,316.84 = 0.47 cubic feet
- Product volume (cubic metres): 13,500 / 1,000,000 = 0.0135 cubic metres
