Hip Curves For patternmakers, designers, tailors - everyone involved in creating garments reaches for this tool to draw not only the countours of the human form but also trouser inseams, lapels, sleeves, skirt seams, etc. See chart below for calibrations. French Curves These tools complement the hip curves by adding the various curves formerly found only in an entire set of French curves. These curves aid in obtaining more defined curves in neckline and collar design, pocket contours, armholes and more. See chart below for calibrations.