Tailoring denim is a tricky business and should be approached with care. It’s hard to recommend you mess with the waistline of a pair of jeans–it’ll throw the whole fit off, for one thing, and besides, it just looks weird–but sometimes you do need to make an adjustment to the length. In those cases, you want to get the look right. The last thing you want is a simple folded stitch like mom used back in grade school. The solution: take it to a real tailor, and be sure to ask him for an interlock stitch. This will prevent fraying and retain the original stitched, wavy hem of your denim.