Taobao has about 800 million product listings

"Taobao, a website dreamed up in Mr. Ma's apartment a decade ago, has about 800 million product listings from seven million sellers who pay Alibaba for advertising and other services. In 2013, the combined transaction volume of Taobao and another Alibaba-run shopping site called Tmall reached $240 billion, says a person with knowledge of the figure.
The total is more than double the size of Amazon.com Inc., triple the size of eBay Inc. and one-third larger than the value of all the transactions last year at the two U.S.-based e-commerce giants combined."

Source:  WSJ, 15th April 2014