I buy most of my clothes at Ross. I wear petite sizes - not because I'm skinny, but because I'm short!
I often buy Liz Claiborne clothes for 1/3 to 1/4 retail price. They have a great variety of clothing - not just designer.
Because it is a discount store, you have to shop it quite regularly because they get new stuff in everyday.
I know that Ross has a plus size shop - I'm not sure of the selection, but it is much less expensive than retail.