Measurements should be taken directly on your body.  

A: Measure your chest over the fullest part of your bust while wearing a bra that fits.

B: If you're shopping for a bra you should take another measurement directly under the bust.

C: Measure your waist at the narrowest point.

D: Your seat measurement should be measured around the fullest part of your low hip.

E: Inner leg length is measured from the top of your inside leg down to the floor.