I feel this is a bit oversized. I still fit in it and I'm an 8/10 and it fits perfectly on the mannequin which is a size 8, but I wouldn't go any higher. Product Details (from LL Bean) Enjoy both coziness and style with our Sherpa Fleece Vest, featuring the loved plush softness and warmth -- with flattering waist and scallopped hem •COMFORT LEVEL: WARM •Best for multiple seasons, mild temperatures and layering up for adventures. •Slightly Fitted. •Falls at hip. •Center back length: Regular 24.5" (PTP is approx 18") •Fabric & Care •Body: 100% recycled polyester. •Body lining: 100% recycled polyester. •Woven overlay: 100% nylon. •Machine wash and dry. Our bestselling Sherpa Fleece, in a stylish vest. Made from 100% recycled plush sherpa fleece, with a soft jersey lining.