In many female cosplay costumes, a corset is a integral part of the costume. There are a lot of “period” (however fictitious the period may be) costumes, where corsets are the norm for the female characters. Ciri’s corset is more of a protection. It is made of leather. From the pictures, it doesn’t appear to have lacing at the back, so it is fitted to her measurements.
I decided to not do lacing in the back, so instead I fit it exactly and put a zipper in the front.
Measurements and drafting: