VTG Express Knitted Blue Denim Zipper Jean Jacket Women Size M or S ??  Fitted Slim 6 Pockets

Tightly knitted fabric cut in detailed pieces in fitted slim style.

Size tag is M, but may be smaller for most vintage clothing have a narrower size chart.
Please review all actual measurements below :

Size M /S?
Details :
There are more details that you can review on the top photos.

Condition - Vintage , pre-owned in very good conditions.
Does not have heavy wear & tear ; just the normal wear as common with jean jackets.
All buttons in place ,all zippers work well.