Women's Size Chart Pants & Jeans
Pants and Jeans - Numeric Sizes
There is no universal sizing system. Therefore a lot of manufacturers' fit guides can be a little on the generous side, so that we can “fit" into a pair one size smaller than our actual size. The psychological effect is obvious. Who wouldn't swear that these are the best fitting jeans they have ever owned for their size 10 body, even though they are really size 12!
Retailers and manufacturers alike have their own reasons for not wanting a "uniform sizing code", if such a thing were even possible. And that is to perpetuate the mystique of the perfect fit. They believe that a brand's "sizing" is an integral part of its identity. It distinguishes one designer from the other in the eyes of the consumer. A Gap jeans fit is very different from a Rock & Republic. They each shoot for a segment of the market that will, when they find them, swear that they are the best jeans ever.