Pork (well, U.S. hogs really)

The size of the market presented here is based on values at the wholesale level, farm receipts for sales of hogs.

Geographic reference: United States
Year: 2009
Market size: $14.4 billion
Source: “U.S. Farm Sector Cash Receipts from Sales of Agricultural Commodities, 2006-2010F,” one of many tables on the USDA’s Economic Research Service website, available online here.
Original source: Economic Research Service, United States Department of Agriculture