The Susan Blouse also makes for a nice dress, you know?
Added May 13, 2011
Measure from your waist downwards to where you want your dress to fall. Draw a straight line downwards the center front and back pattern pieces and mark the new length (measuring form the marked pattern waist).
Measure the vertical distance from your waist to the widest point of your hip. Mark this amount on the pattern from the waist downwards (front & back). Square a horizontal line from the hip point.
The pattern has about 30 cm/12in of ease. Add this amount to your hip circumference and divide this amount by 4 to get the width for one pattern piece. Mark this measurement ((hip+ease) / 4) on the horizontal hip line of the front and back pieces.
Draw the new outline/sideseam of the pattern. Ignore the tucks on the old waistline and use the old side seam as a guide to start your new outline. You can go straight down from the hip line or flare the skirt a bit. I made the hem just a little bit wider so front and back piece would fit on my folded 55" fabric next to each other. If you flare the hem a lot, make sure to measure the center front from waist to hem and mark the same measurement from the hip on the sideseam to the hem. You might have to curve your hem a bit for this. If you don’t do this, your sideseams will sag (because they’re too long // longer than the center front/back, that is).