So for us, we need to have least 3.3 ounces, preferably drinking the majority, or whole cup.
and we recline to our left!
So, men and women both have the rabbinic mitzvah to drink 4 cups of wine. But why 4 cups?
well, better go work on my TSBP project.
Well ,there are two answers to this. The first one (and the most known one) is to represent the 4 lishonot used to describe Hashem taking us out of Egypt. Vhotzaysi, Vhitzalti, vlakachti, Vgaalti
*we recline on the left for two reasons: a) Food is normally held in the right hand. Leaning toward the left leaves the right hand free. (accept that I'm a lefty, and it makes life really hard sometimes.) b) Leaning on the right is a choking hazard
The second reason is corresponding to the 4 nations that enslaved the Jews. Greece, Babylon, Persia, and Rome. Even though we are in galut Yavan now, we believe Hashem will take us out!