New with tags! Size Small. Never worn, brand new Hello Molly Sage dress. Here are the details from their website: Length from shoulder to hem of size S: 74cm. Mini dress. Lined. 
 Cold hand wash only. 
Model is a standard XS and is wearing size XS. 
 True to size. Lightweight, non-stretchy satin fabric. No zipper. Slip-on style. Polyester.