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Product Advertising API
Developer Guide (API Version 2013-08-01)

NarrowBy Values

The following table describes the NarrowBy values.

NarrowBy Values Description
BrandName Brands, such as Levi's, Reebok, and Nike, that create the item. Use the name of a brand to filter out similar items made by other companies.
PriceRange Minimum and maximum prices for a bin of items. Use the minimum and maximum price values in each bin to filter out items outside of the price range you want.
SpecialSize Uncommon sizes an item comes in. Examples are "Plus Size & Tall", "Misses", "Maternity", "Husky", "Petites", and "Big & Tall".
Subject BrowseNode IDs of all topics related to items returned by ItemSearch. For example, searching for books about dogs returns, in the Subject bins, BrowseNodes for "Home & Garden", "Animal Care & Pets", "Dogs", and "Educational".

All search indices return the Subject bin. Most return all of the bins.