How To Measure Dress Pant Length. Decide on the length and the pant break (the break in the pant leg as a result of excess fabric) you want. Hold the tape securely and then bring it down to the bottom of the pants.
Start the tape measure at the hole you use and measure to the end of the belt, where it meets the buckle. Wear belt if you habitually wear one. Hold the tape securely and then bring it down to the bottom of the pants.
Then measure to the top of the spine of your book from floor.
For an accurate pant size measurement, ask for any assistance, or take a pair of existing pants, lay them flat and measure the inseam. Measure the right leg from the top inseam point to the bottom side of the lowest inseam point. For dress pants, side length, rise and leg opening need to be taken into account. Wear belt if you habitually wear one.