how big to make each document?

The most important point here is that a document (web page) should put across a well-defined concept.
       It is not generally worth splitting one idea arbitrarily into two bits in order to make the bits 
       smaller. Nor is it a good idea to put together ideas which are really separate just to make a 
       bigger document. A document can be as small as a footnote. If the document demands length,
       then it should possibly be broken using hypertexts.

Reasons for restrictions on the size
  -    Long documents will take longer to transfer and so a reader will not be able to simply jump to
        it and back as fast as he or she can think. This depends a lot on the link speed of course.
  -    It is difficult for a reader to scroll through large documents. Readers with character based 
       terminals don't generally read more than a few screens. They often only absorb what is on the 
       first screen, as if that is not interesting they won't be bothered to scroll down.

Roughly, the document size should be
       For long textual documents, try keeping your page upto that of half A4 size page moving on the 
       matter to next pages.
       For document showing menus giving access to other things, don't make the page longer than 24
       lines. 



                                      Hypertext > Styleguide to hypertext > Structure of Work > How big to make each document?