http://www.pantos.org/atw/35305.html  Gives you an idea of size of files for best optimisation.

http://www.pantos.org/atw/35542.html  Some useful information about what large file size means to a user.

http://www.cns.pdx.edu/~millercr/imageht/intro.html A good discussion as to what effects File Size, and relates the discussion to the preparation of graphics. 

Use this source to prepare a report of 100-150 words on file size.  Remember you need to explain how the issue can effect the client, and discuss how you will address the client's concerns.  In other words, what strategies will you use in the development of his product.

Note:  You need to write in your own words.  Plagiarized material will not be accepted.