Add a 1-inch (2.5 cm) seam allowance specifically at the center back. This provides enough "meat" for the zipper teeth to sit securely.
Drop the outer shoulder point by about 1.5 inches to mimic the natural slope of the body. BahSeexy_B_n_zip
The bodice block is a 2D map of your torso. Beginners often start with tutorials like the Basic Bodice Pattern for Beginners to understand dart placement. Add a 1-inch (2
Draw a rectangle where the width is half your bust measurement (plus 2 inches for "ease") and the length is your back length. BahSeexy_B_n_zip