I would say the best brand of designer jeans for petite people would either be Paige jeans or True Religions. Paige use to be a fit model so she knows exactly how to make great jeans for women, and True Religion jeans are generally very fitted which is good for a petite person. Another brand to check out is Hudson jeans, these are probably my favorite designer jeans. They usually have lifted pockets on the butt which is great because it adds a little more, and their jeans are made very well and SO comfortable!!
The best brands for petite girls are Joe?s Jeans ?Provocateur? which are made specifically for gals 5?4 and under. Kasil?s ?Luna? jean which is a great fitting straight leg jean and AG ?Angel? jean are also great choices for the petite lady.