It runs true to size, but, as a heads up, you might want to reserve it for indoor affairs
Of course, you can also wear a chambray or denim shirt: over a tee or tank & unbuttoned under a sweater under a vest with a skirt under a jumper dress with joggers with jeans blue, black, ivory, etc
She's also sporting a vintage Coach 9135 Crossbody Bag in light beige, which is also not as readily available
Oh, and don't forget: A pair of sunnies can give any outfit a more laid back look, plus they'll come in handy if you're spending time outdoors
Women typically wore a cloak-like headdress that extended down to their ankles and was used for the same purposes (and, famously, for accidentally inventing the unleavened Matzah eaten on Passover: So the people took their dough before it was leavened, their kneading bowls being bound up in their cloaks on their shoulders. [Exodus 12:34])