As mentioned by a pp, I am also very fond of Palazzo pants with a longish sleeveless top and a very long overshirt preferably calf length. I wore a version of this to my son's wedding and this style is my failsafe go to.
Another go to is a pale grey and white silk one size fits all oversize top with sleeves that is well below the knee and looks great in summer with wide white linen trousers or narrow white ankle grazers, or in winter with black ankle grazers. It cost me £5 in a Lanzarote market and rolls up into the size of a hankie for travellung, without creasing.