Product size tiers

Definition	Product size tiers are measurement categories based on the unit weight, product dimensions, and dimensional weight of a packaged item.
Using this article	The product size tier of an item is used to calculate certain fees. After reading this article, you will be able to determine the product size tier for an item. To accomplish this task, you should first know the unit weight, product volume and dimensions, and the dimensional weight of the item.
Fees that use this attribute	FBA fulfillment fees Monthly inventory storage fees Long-term storage fees FBA inventory storage overage fees FBA removal order fees FBA disposal order fees Fulfillment fees for Multi-Channel Fulfillment orders FBA Inventory Placement Service fees FBA Prep Service fees
Related terms	Dimensional weight Product dimensions and volume Unit weight FBA fees reimbursement policy: Weight and dimensions Shipping weight

How to determine the product size tier

Determine the volume and dimensions of the item.

Determine the unit weight and dimensional weight* of the item.

Use the above values and the table below to determine the product size tier.

Find the row in the table below with measurements that do not exceed the weight or the dimensions of your item.

Product size tier	Unit weight*	Longest side	Median side	Shortest side	Length + girth
Small standard-size	16 oz	15 inches	12 inches	0.75 inch	n/a
Large standard-size	20 lb	18 inches	14 inches	8 inches	n/a
Small oversize	70 lb	60 inches	30 inches	n/a	130 inches
Medium oversize	150 lb	108 inches	n/a	n/a	130 inches
Large oversize	150 lb	108 inches	n/a	n/a	165 inches
Special oversize	Over 150 lb	Over 108 inches	n/a	n/a	Over 165 inches

Important: *For apparel, for all small standard-size and large standard-size units weighing more than 0.75 lb and all small oversize, medium oversize, and large oversize units, Amazon uses dimensional weight when it is greater than the unit weight.

For non-apparel, Amazon will use dimensional weight when it is greater than the unit weight for all large standard, small oversize, medium oversize, and large oversize units.

Go to Dimensional weight for more details.

For products you currently have in FBA inventory, you can also look up your unit weight using the Fee Preview report. To do so:

Download the report.
Identify the product you want to look up using its FNSKU.
View the product size tier in the product-size-tier field.

Product size tier examples

Mobile device case

Dimensions: 13.8 x 9 x 0.7 inches

Unit weight: 2.88 oz

Product size tier: Small standard size

T-shirt

Dimensions: 8.5 x 4.8 x 1 inches

Unit weight: 6.08 oz

Product size tier: Large standard size

Frequently asked questions

Which measurement system does Amazon use to measure products and calculate fees, imperial or metric?

The measurement system for product dimensions and volume vary depending on the local standard in which the fees are calculated. The fee Help content for the region indicates which measurement system and units are used for that region.

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