1. Measure around your natural waistline over any under garments which may be worn.
2. Wrap the tape around your waist just above your hip. Keep the tape loose enough to slide a finger between the tape and your waist.
Measure your inside leg length:
1. Measure from the inside leg at the crotch where the seam meets the seam of the opposite leg to where the trouser hem is to sit on the shoe. Run the tape measure down the inside of the leg to a point near the middle of your foot