To determine your size, measure your high chest above your bust. Use this measurement to compare with the bust measurement on the pattern size chart. This will be measuring your bone structure and choosing the pattern size closest to this. Take a look at that multi-sized pattern and, using your ruler, measure between the size lines at hash marks on bodice diagrammed left. This amount you need to adjust per size. Need it one size larger? Just add that amount outward. Two sizes? Multiply the difference by 2 and mark lines that far out. Use a straight edge ruler or a curve stick located so curves blend perfectly for the new size. Do this slowly and accurately or your pattern pieces will not match.

Do you need that pattern smaller? Reverse the process. It is that simple.

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