A lot people that write about designer jeans are giving all the credit to the so called Top Brands : True Religion, Seven. I don't want to take any credit from their quality, but there are hundreds of designer brands that deserve some credit. In my personal experience with Plastic By Gly Jeans, I can assure is a brand that excels in quality. Also actual customers can give testimony of satisfaction with the jeans produced by this manufacturer.
Most brands offer a great variety of styles for every taste. There is the wide legged, flared, boot cut, straight, skinny , just to mention some. The more popular designer jeans styles are the flared and the boot cut, the other are trailing. Some of this styles have been around before but fashion always tends to cycle with some adjustments to make it more appealing, for example the low rise style.
Fabric for most brands are known to come from Japan. South America is another source for fabrics specially Medellin, Fabric manufacturer and design in Colombia. They produce the so called lift up jeans, which are specially design to lift up the buttocks.