On this page there’s 7 highlights (premium only) outlining what Costco are doing right and wrong. (Tip: use the arrows above or on your keyboard to navigate all 160 ‘Homepage & Category: Top-Level Navigation’ design examples.)
The screenshot was taken October 31, 2013 and depicts Costco’s Top-Level Navigation. In total, we’ve reviewed 49 of Costco’s design elements. To see them all, visit the full Costco UX case study.