where do I go to find information on the certain size of an industry, whether its fashiion or gaming?

Question

Market Research.

Answer 1

There's a lot in The World Almanac, and probably also quite a lot in the government statistical pages. I would start with a simple search engine of "gaming industry revenues" or something, which gets in the fact that you are talking about the industry, not the games themselves.

Frankly, I am surprised you haven't gotten any answers to this before me. It always seemed to me we had a lot of economically competent people around here. I'm just your average old hag with a bit of experience researching things.