Don't have anything that fits? When you're losing weight you'll need a few essential pieces to fill in the gaps. Look for easy knits with a nice drape and simply constructed pieces that will take alterations easily. Use layers to conceal; colors and interesting details to play up your good points.
Corduroy gives you a strong vertical look (always slimming) and added stretch gives you the versatility to wear a jacket or pants even if your size changes.
A poncho is basically one-size-fits all, so this basic is a perfect layer for cooler weather.
Wear the cardigan unbuttoned for a flattering layered look while still losing weight; bare your arms in the shell after you get more toned.
Black is always flattering, and knit conforms to your shape (whatever size it is).