The size is listed as M, but it's a free size (M to L). You can wear it as is, but it also has buttons, so I think you can use it as a liner for your outerwear. I've only worn it about twice. There are no particular stains. Please refrain from purchasing if you are sensitive to used items. Instant purchase OK. _ Girly Doll titivate emoda murua sly JEANASIS jouetie merry jenny moussy jeanasis brands studio Dholic wego spinns w closet mercibeaucoup sly emoda cool MURUA azul by black jouetie LOWRYS FARM GLOBAL WORK studio CLIP Heather HARE apart by lowrys merry jenny Korea zozo kutir pale color LAUIR