J JILL black Precision Stretch side zip trousers sz 6. At J.Jill we appreciate that our customers come in an array of sizes and shapes, and we understand the nuances of varied body types. That’s why we focus on continually creating fabrics and designing styles that look great on every body. Our precision-stretch slim-leg pants are a perfect example of the way we combine unique fabrics with timeless silhouettes to create universally flattering clothes. In our new flexible, moves-with-you stretch fabric and a refined leg shape, these pants give you a wonderful starting point for so many outfits.