The Kula Exchange takes place on eighteen islands, including the Trobriand Islands, and involves thousands of people. The traders involved travel by canoe over hundreds of miles to exchange their Kula valuables. These valuables can be in the form of red shells that are traded to the North of the Islands, or in the form of white-shell armbands, which travel to the South of the Islands. Therefore creating a ‘ring’ of moving valuables throughout the islands. The terms of trade change in different regions. For example, some traders have to exchange a white armband for a necklace or must trade a red shell for a white shell armband. There are also differences on who can take part in the trading process such as in the Trobriand Islands their chiefs mainly take part in the exchange process, whereas in Dobu, anyone can take part. 