Bra Pattern Style 1-C-CUP 1 and 2 Using the dress foundation to waist line only, close up the side dart in front; then reduce width of front at side seam by dotted lines in diagram 2. 3) Reduce width of back at side seam; then draft bra front and back as shown by dotted lines. Shift side seam, 1-1/2” forward, and mark sections A-B . . .