Measuring yourself for a suit jacket is easy. First, you'll need to determine your chest size. To do this, measure from around the top of your chest underneath your arms. The number associated with the jacket is your chest size. Next, you'll need to determine the jacket length. Jackets come in three lengths and are determined by your height. So let's say you are 6 feet and 1 inch tall. You would wear long. Now, you'll need to determine your suit pant size. First, you'll measure your waist. To do this, measure from around your waist near your navel. The tape measure should be snug. Use that number to determine what size you are. Next, you'll need to determine your pant inseam length. Measure from the top inseam point to the bottom inseam point. You now know your suit pant size. Use that along with your suit jacket size to find and enjoy your Haggar suit.