Vintage 80s French school girl sailor midi dress medium

This vintage dress is in excellent condition-tag is missing so I am guessing M or 8/10 based on how she fits my mannequin. Check the measurements listed below. Across dress laying flat Pit to pit 21” Waist 18” Shoulder to shoulder 16” Waist to hem 26.5” Overall length 44” 100% polyester-light weight navy blue with white Peter Pan collar, red bow tie and red sash. 3/4 slightly puffed sleeves with button cuff. Double button clause at back. Elastic waist. Pleated skirt, and top has pleats down the front. Very cute vintage midi dress in excellent condition. Smoke free home.