What is market size? How to calculate it? Thanks!
Since this is not my area of expertise, I searched Google under the key words "'Market size'" to get these possible sources:
http://www.investorwords.com/6576/market_size.html
(Broken Link Removed)
http://www133.americanexpress.com/osbn/Tool/biz_plan/market/sizetrend/index.asp
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
I hope this helps. Thanks for asking.