Zappos is a B2C website selling shoes in the United States. Since its launch in 1999, it has grown into the largest online shoe selling website, surpassing Amazon. Zappos's sales range has expanded from the earliest footwear to accessories such as leather bags, gloves, scarves, sunglasses, as well as kitchen utensils, household appliances, toys, etc. 1. Zappos promises delivery within four days, but usually customers can receive their ordered shoes the next day.