On this page there’s 6 highlights (view in Baymard Premium) outlining what Amazon are doing right and wrong.
(Tip: use the arrows above or on your keyboard to navigate all 306 search field examples.)

The screenshot was taken on August 26, 2014 and depicts Amazon’s Search Field. In total, we’ve reviewed 90 of Amazon’s page designs. To see them all, visit the full Amazon UX case study.