How to Measure Your Bust for a Dress: A Step by Step Guide Classic Tea Length Satin Dress with Bow SMCDress Ida Sandor Size Chart This bust took us a couple of tries to get right! We ended up unpicking it and pinning it on her body so that we knew the exact fit we wanted. Both pieces of the bodice have a fair bit of bias stretch How to understand bust size in a dress size chart? Under bust cut style line* is a design detail where the seam or cut of a garment runs directly beneath the bust area. It's often used in dresses, tops, and gowns to: *