Cosplay Middle School Jacket and Pants

Japanese inspired middle school jacket and pants cosplay. Lined with pockets. In great condition. Pretty sure it’s made of polyester blend but unsure. This is an Asian size large but would fit a US small/medium Measurements (flat and approx.): Sleeve: 23.5” Bust: 18.5” Length (shoulder to bottom hem): 27.5” Should to shoulder: 16.5” Pants: Waist: 15” Outer seam: 41” Inner seam: 30”