1. Start by drafting a vertical line down from point W.2. Mark Rh, T , G and L (depth of scye, waist length, depth of seat, and total length)3. m is ½ from W to Rh.4. G is 1/8 of Kg down from T.5. Draw perpendicular lines to the left from each of the above points6. h to W is your back neck measure.7. Go up vertically 2.5 cm to find point H