How many standard drinks is a Cosmopolitan?

Could you please clarify for me how many standard drinks does a Cosmopolitan actually contain? I've heard different opinions on this matter and I'm trying to get a more accurate understanding. Is it one, two, or perhaps even more? Could you also explain what constitutes a "standard drink" in general so I can better understand the comparison? It would be helpful if you could provide a breakdown of the ingredients and their alcohol content in relation to standard drinks. Thank you for your assistance in clarifying this matter for me.