BSB stands for Bottom/ Below Shoulder Blade. Since BSL can be a moving target depending on which bra you use, BSB measures from a body part like the other lengths (SL, APL, WL, etc).
BSB stands for Bottom/ Below Shoulder Blade. Since BSL can be a moving target depending on which bra you use, BSB measures from a body part like the other lengths (SL, APL, WL, etc).