Want. Need something approximating it. This is the kind of basic, classic piece that could easily be dressed up or down and would get me through just about anything summer has on offer. (Heels and a black halter? Yep. Jack Purcells and a short-sleeve v-neck? Check.)Stella McCartney denim skirt, $365 at net-a-porter.com.
There's probably a facsimile at a thrift store near you.