7228 pages of ISO ooxml
The final text of OOXML was not published in time. A good reason for a complaint. Now jtc1 members apparently got the text.
4 parts:
part1: 5570 pages
part2: 137 pages
part3: 46 pages
part4: 1475 pages
SUM: 7228 pages
Guess how many pages the other format ODF 1.2 would comprise. It is estimated to become even shorter than the ODF 1.1 spec. Although they are adding material, they are also rewriting it to be much more concise and precise. So, probably around 700 pages in the end.