FB5 Bust Ease:  The Renaissance style corset should push the bust up. The corset is made slightly smaller through the bust area to increase the push-up effect.  The amount of push-up varies according to bust size and personal preference.  Bust ease will be minus 1" - 2" (2.5cm - 5cm).  Wearers with a small bust will probably want a bust ease of 0.  Be sure to enter this number as a negative number.