If the pattern should be drafted with a basic full bust adjustment (FBA). This will result in a more fitted garment for people with breasts.

If you don’t enable this option, Bibi will essentially be drafted for a body without breasts that has the same chest circumference as your body with breasts. For people with breasts, this will cause a bunch of extra fabric at the chest and armholes that will make the top look like a poor fit.

There is usually no need to disable this option. It will have little effect on people with smaller busts or no breasts.


When the optional bust related measurements are not available, no FBA will be performed and this option has no effect.