In this paper the role of contracts in coordinating the supply of grapes between independent wine grape growers and wineries is examined. A review of technical issues that underpin the design and implementation of contracts provides insights into the wine industry. A review of the economics literature on contractual relations in the wine industry indicates that although grape contracts are important they are subject to a number of problems. In particular, the precise determination of grape quality is a source of tension, as are current pricing arrangements.