If you ask me, I'd say that almost every piece in your closet can somehow make its way into a business look.
Many classical business looks seem so uptight, but I think it is all a matter of proportions and color. For a more relaxed look, I'd suggest pairing a suit skirt with a cotton t-shirt; wear loose fitting jackets or blazers on top of perfectly fitted dresses or casually wear your oversized clutch. If you can't carry your entire life in a clutch, go for a structured bag and pair it again with more relaxed items like shirtdresses.
When it comes to the shoes, pick a pair of wedges if you want to be comfortable.
These are perfect for long days at work and you can take them directly to an afternoon lunch!
Flats are also a smart choice, but try picking a pair with some interesting detailing going on, like patent leather inserts.
This being said, here are some more ideas to add flavor to a casual business look:
FOCUS ON JEWELERY. Chunky golden cuffs would be my first option, but why not draw attention to your face and what you have to say? Keep your outfit simple (think a white cotton tee for the upper part), but top it with a cooler than cool necklace:
KEEP WEIGHT OFF YOUR SHOULDERS. Flaunt a (slightly bigger than the average) clutch or pouch.
SHIRT + DRESS = Casual shirtdresses
WANT MORE OPTIONS?... pick a skirt! It is much more versatile.
WHEN IN DOUBT: