Quantity Not Quality. Wait, That's Not Right.

In the English Department there is a very big office with loads of bound dissertations offering inspiration and intimidation. I checked a few out today to look at format and page count. It appears dissertations in the department range from 140 pages to over 300. I expect to have four chapters, approximately 40-50 pages each, an introduction of about 35 pages and a conclusion of about 15 pages. My master's thesis was somewhere between 40 and 50 pages so I figure each chapter is like a mini master's thesis. It seems more accessible that way.
And, if anyone cares, some have footnotes, some end notes at the end of chapters and some end notes at the end of entire text, just prior to the bibliography. The seem to all use MLA style.