Diane Von Furstenberg Silk Swim Coverup

I bought this on Thredup and sadly have never worn it. Just want it to go to a home where it will be used! Diane Von Furstenberg x Soleil Swim collab Not sure the size on this. The tag says P? (I don’t think it’s for petite, the length feels normal) I’m typically an XS and I’d say this fits more like S/M.