Some might say the market size isn't that important. beg to differ. A large market suggests greater potential for revenue and return on investment. A large market indicates startups can scale and capture a substantial portion. A large market may mean a substantial customer base that's underserved. Most importantly.. By incorporating market size into a pitch, you demonstrate a solid understanding of your: > Industry >Competition > Target customers > Growth potential Market size may just be one factor investors look at. But it's still a factor to carefully and knowledgeably present. What you shouldn't do: XAnalysis paralysis from overemphasis on precision. X Being too fixated on initial market size. Iterate. X Spending too much time on it - over PMF. Use the pocket guide to brush up and understand how to present your market size.