According to Apple's website:
3G iPhone = 115.5 x 62.1 x 12.3 mm (L x W x H)
2G iPhone = 115.0 x 61.0 x 11.6 mm (L x W x H)
Or for those metrically-challenged people:
3G iPhone = 4.5 x 2.4 x 0.48 inches (L x W x H)
2G iPhone = 4.5 x 2.4 x 0.46 inches (L x W x H)
Which doesn't show as much difference since inches are far less accurate than millimeters.
-Marc
3G iPhone = 115.5 x 62.1 x 12.3 mm (L x W x H)
2G iPhone = 115.0 x 61.0 x 11.6 mm (L x W x H)
Or for those metrically-challenged people:
3G iPhone = 4.5 x 2.4 x 0.48 inches (L x W x H)
2G iPhone = 4.5 x 2.4 x 0.46 inches (L x W x H)
Which doesn't show as much difference since inches are far less accurate than millimeters.
-Marc