It's one thing to spend more than $100 on jeans. It's another to find out that Citizens of Humanity cuts for supermodels' legs, leaving lowly civilians like us with dragging hems. We don't trust our home-ec skills to leave anything but a jagged, obvious line on that pricey denim. Which is why we trust one place to deal with our jeans' needs: Rydell's in Brookside, part old-school tailor, where workers examine suits and silk dresses, and part new-wave dungaree doctor. This is where to go when you need your hem cut off and reattached -- that's a "perfect hem" in the biz -- so it looks like it's never been hemmed in the first place, or where to get an embarrassing hole in the bum sewn up so nicely that no one will ever know you split your jeans. Except, that is, your tailor.