I love this type of outfit. It looks kind of nice, but it's as comfortable as can be. The skirt can sit at whatever point it fits best (notably, it can sit higher if I ate a huge meal). The shirt is really just a t-shirt, but the draping takes it up a notch. And these Naot sandals fit me well and are very comfortable to walk in, but the thin straps look a little nicer than Birkenstock-style sandals.
This could easily be made a bit fancier with jewelry and a nice bag. It worked just fine like this for my usual errand-running and perpetual snack-making and crumb-wiping.