A good maximum sample size is usually 10 as long as it does not exceed 1000. More than two groups supported for binomial data. The Cochran formula allows you to calculate an ideal sample size given a desired level of precision desired confidence level and the estimated proportion of the attribute present in the population.
For most market.
Sample size is a statistical concept that involves determining the number of observations or replicates the repetition of an experimental condition used to estimate. Population size refers to the total number of people within your demographic. Similarly if you are surveying your company the size of the population is the total number of employees. Cochrans formula is considered especially appropriate in situations with large populations.