Dear, For sample size determination following link may help

http://fluidsurveys.com/university/calculating-right-survey-sample-size/

https://www.isixsigma.com/tools-templates/sampling-data/how-determine-sample-size-determining-sample-size/

See W.G. Cochran, Sampling Techniques, 3rd ed. It is the classic in this area.

Best, D. Booth

Check out this book: Sarjider Singh, Vol 1 &2, it is self-explanatory.

Goodluck

Thanks for your consideration.

Salam Dear Dr mohammad amin; its my suggested way:

https://www.google.com/search?q=sample+size+calculator&oq=sample+s&aqs=chrome.2.69i57j0l7.7876j0j7&sourceid=chrome&ie=UTF-8