Need help finding smallest possible 8 digit 7 Segment LCD TN Display
The Densitron DG-067 package is 38 mm wide x 15.2 mm high.  The viewing area is 34 mm x 12.1 mm.  The characters are 6 mm (1/4") high. 

BTW the datasheet doesn't mention TN, but this page where it is listed is titled "LCD Glass, Segmented Glass, TN Glass"