Banana Republic Linen-Blend Ruffle Wrap Dress white size 12 but fits like a 10

Banana Republic Linen-Blend Ruffle Wrap Dress white size 12 but fits like a 10 see measurements Brand new with tags, never been worn. Excellent condition, no flaws Fully lined linen dress features a faux wrap in front with ruffles and zipper on side. Has adjustable straps and waist tie Bust 39 Waist 34” Length from pit 34”