Where to put the market size in your startup pitch? It depends.
- Option one is early on in the pitch, when you are convincing investors of the need for your invention. In many cases however, investors will not doubt the size of the market, they doubt whether you can get a share of it. When you claim you have a cure for cancer, the issue is not whether there will be demand, the issue is: does it work. The exception is for cases where everyone thinks a market is small/non-existent: you might have to pull out stats about the number of patients that suffer from a rare disease x the amount of money that people spend on a therapy.
- Option two is to put the market sizing towards the back of the presentation together with the business model and revenue scenario forecast of your company. Market size is used to sanity check your financial numbers, rather than convincing investors of the need of your product. For most businesses a bottom up market forecast, works better than a $1b top down number copied from a random research report.