What is the most attractive jean size or weight for a girl?

I was looking through my closet and saw some old jeans from middle school & early high school and I'm feeling depressed and fat lately because I can't get in them anymore.

I'm about 5'6 so I'm not like super tall but I do have a bit of height. What do you think is the perfect size for a girl like me? How many pounds do you have to lose to go down a size? I thought it was like 10 or 15.
What is the most attractive jean size or weight for a girl?
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