How many milligrams of nicotine are in a cigarette?

Excuse me, could you please clarify the amount of nicotine present in a single cigarette? I'm curious to know the specific milligrams of nicotine that one typically finds within the typical cigarette. Is there a standard measurement that can be applied across different brands or types of cigarettes? I understand that the nicotine content can vary, but I'm seeking a general idea or an average amount that could serve as a reference point. Thank you for your time and attention to this matter.