Announcement reposted from Amazon:
We’re excited to announce the official launch of the Small Business Search filter. This feature makes it easier for customers to discover products from small-business brands and artisans on Amazon.
When a customer’s search results include eligible products from small-business brands, the new filter will appear under Business type in the customer’s search filter options.
Any small-business brand that meets the Small Business badge criteria, and has the badge featured on their products in search or detail pages, is eligible for inclusion in Small Business Search filter results.
For more information, go to Small business products FAQ