'You might want to rethink your panty/trouser combination' was just one of the messages I received on our internal chat, when I was being vilely bullied by some managers I am delighted to report are now unemployed. Jobless because they're arseholes, not because of their rampant sexism, but still.
They had waited till I was on the floor plugging in some IT to squeal with delight as you could see a bit of granny knicker popping out of the top of my for All Mankind Jeans. And emailed the office about it.
Tall thin women automatically look professional - their bodies are way more male and thus acceptable in business. Yes, it is that sexist and simple.
Small fat ladies may have to make an effort, as I do, to avoid comments from twat managers.
OP, either you fight the twats & enter a world of pain or adjust a bit and then take on the silly people, thereby winning.
I was mercilessly bullied by my cow of a boss (female) but who had the last laugh when I got a better paid job than she did, arf, so it shows you that 5 min can work wonders (see below). I now do that job in my pyjamas - not a coincidence.
Adjustment should take no longer than 5 min; you are removing droop and flap, replacing with crisp and neat. I hate crisp and neat, but it's quicker than you think. Channel suburban, dull and bland.
Hair is a bitch for letting you down. Keep it short or tie it up. Smell nice - scent takes 5 secs to spritz. Buy 5 plain cream shirts from Primark a size too big and wear a clean one every day. Ditto 3 pairs of dark blue trousers. Do not wear socks, they'll show - pop socks or tights, sorry. Blazer on back of chair. Clear nail polish.
Absolutely no clothing with fringes, limp scarves, oversized anything. Brown is forbidden. Red jackets are good. Jewellery either non-existent or expensive. Men's coats are brilliant if you are tall enough.Get a decent handbag. Never carry a plastic bag to a meeting. That's it.