hi. i just graduated last july and my mom is asking me what gift i want. i told her i want a birkin but i haven't decided what size and color to buy. i'm 5"1 and i look young for my age. what size (30 or 35) and color of birkin do you think is best for me? is it blue jean, potiron, classic orange or black? is there a difference between potiron and classic orange? and i saw a birkin. its color is like brownish tan. what color is that? please send pictures if you can. thanks.