it. This works best when the pants fit you everywhere except for the waist. We all have perfect non-average bodies that need special fitting. I bought these pretty red corduroy pants for the holidays, and they fit well everywhere except for the waist. The waist was just a tad too big so I took the waist in, and now the pants fit perfectly. This technique does not work for pants that are multiple sizes too big for you. Use a marking tool to mark on each side of the wedge. Feel how far the wedge goes down, usually down to the widest part of your hips, and mark a line across. Take the pants off. Check out your marks. 