The mary-kateandashley brand clothing line is sold exlusively at Wal*Mart stores across the country. I'm going to get pictures of the clothes from the official website for you, and I'll put them up here when I have time. So if you want to see the clothes right now, go to marykateandashley.com. Yes, the models seem a little warped, but that's okay, I guess! Anyway, check this page again sometime to see if I have put up pictures.
They make different kinds of clothes, including (in alphabetical order):
Hats and Bags
Supposedly, everything is sold for relatively low prices, and it's supposed to be good quality. Mary-Kate and Ashley started out just making clothes for young girls, but they plan to expand the line into junior sizes as well.
There was an article in the August/September '01 issue of mary-kateandashley magazine called "How to Make a Fashion Line." I typed up the article, and you can read it here.