The New York Times has an op-ed by David Makovsky with maps showing 4 different options.

...During the failed 2008 peace negotiations, the Israeli prime minister, Ehud Olmert, wanted a total swap of 6.3 percent, while Mahmoud Abbas, the Palestinian president, would agree to no more than 1.9 percent. These three maps explore and illustrate the middle ground between Mr. Olmert’s and Mr. Abbas’s proposals. Contrary to popular belief, most Israeli settlers are concentrated near the 1967 boundary. As a result, the scenarios outlined below could spare 68 percent to 80 percent of settlers dislocation from their homes by annexing 3.72 percent to 4.73 percent of the land...
http://www.nytimes.com/interactive/2...ml?ref=opinion