BUST: Measure around chest, under armpits over the fullest part of the bust.
WAIST: Measure around your natural waistline.
ACROSS SHOULDER: Measure across back from shoulder to shoulder.
HIPS: Measure around the fullest part of the hip.
ARM LENGTH: With your arm bent at 90 degrees, measure from Center Back of your neck, across shoulder to elbow and then down to the wrist.
INSEAM: Breeches are designed to hit right above the ankle bone.