These measurements do not refer to the actual measurements of the garments. The garment will be larger than the body measurements in order to provide for comfortable movement.
To get the best fit, stand straight and relax.
Chest: Measure from the fullest part of the chest/bust with your arms down.
Waist: Measure around your natural waistline above the hips.
Hips: Measure around the fullest part of the hips.
Inseam: Measure from the base of the crotch to the bottom end of your pants. Or select a pair of pants that fits you well and measure along the inside leg seam from the crotch to the bottom of the hem.