denoted m with reference to the center back and center front defined later it is the center point of the back neck and the measurement which separates it from the extended line t c is the shoulder width the center back 34 seam 34 line is a straight line originating from the point m and perpendicular to all the horizontal structural lines it crosses the length line at m1 the waist line at m2 the hip line at m3 the pelvis line at m4 and the finished length at m5 drawn from a4 to m6 the back half length line determines half the length of the back parallel to the length line it will be used as a notching reference for future joining up the dotted theoretical back half breadth line is drawn in parallel with the height line from the hinge point c as far as the center back line at c2 the width of the back half breadth is 220 mm in order to draw the dotted theoretical front half breadth line the width of the back half breadth decreased by one tenth and rounded up to the next figure namely 200 mm is transferred from the front hinge point c1 towards the center front as far as the point c3 this line is parallel to the length line and its measurement indicates the width of the front half breadth the center front line is drawn by means of a dotted theoretical perpendicular to the waist line starting from c3 as far as m7 from m7 a value of 10 mm outwards on the waist line marks the point m8 a vertical line starting from m8 and passing through c3 as far as the theoretical back neck.