http://www.dpreview.com/learn/?/key=sensor%20sizes

http://www.dpreview.com/reviews/spec...ny_dscw100.asp
http://www.dpreview.com/reviews/spec...ony_dscw70.asp

1/1.8" and 1/2.5" are common sensor sizes in compact digital camera and have been for years. The first link gives an explanation of the fractional naming conventions. It is a little weird.

I clearly posted the dimensions of both sensors (5.76 x 4.29 mm and 7.18 x 5.32 mm). Neither of those is anywhere close to the size of a 35mm frame of film (24 x 36 mm).