You chose to raise the darts to be 4.5" long. This was the correct choice.

Close to 4.5" is approximately the correct length for this size dress form (11). In this example both darts would be trued to an equal 4.5". Note that when this style is tried on a real person, it is likely that the length of the darts will need to be adjusted, ending above the fullest part of the buttocks.