Vintage Cristy Coat. Size M/L?

Paris fashion brand. Silky smooth white coat. 2 rows of snaps allowing size adjustment. 2 zippered pockets at front. PTP larger setting 22 inches and 19 inches on smaller setting. Length 32 inches. No material or size tags. Machine washable. Some marks around zippered front pockets on each side as shown in last 2 pictures. No belt.