Winston-Salem, North Carolina is 68% larger than Boise, Idaho.
Area: 207 km2 calculated
Boise is the capital and most populous city of the U.S. state of Idaho, as well as the county seat of Ada County. Located on the Boise River in southwestern Idaho, the population of Boise at the 2010 Census was 205,671, the 99th largest in the nation. Its estimated population in 2013 was 214,237. Wikipedia
Area: 348 km2 calculated
Winston-Salem is a city in and the county seat of Forsyth County, North Carolina, United States. With a 2013 estimated population of 236,441, it is the second largest municipality in the Piedmont Triad region and the fourth largest city in the state. Wikipedia