I'm not a big fan of buying larger size non-maternity clothing because they always don't fit nicely and don't flatter your body. If you don't mind looking like a pumpkin, then you can find large size flowy dresses or empire style clothing. But, generally, if you want to look pregnant rather than looking like you gained 30 pounds in a couple months, then I would rather buy some real maternity clothing. Especially for pants - its really essential that you find some maternity pants that will grow with your belly and give you the comfort that you deserve throughout your 9 months.