Classic #17 Plastic Transparent French Curve. To Mark armholes and necklines. Transparent plastic French Curve allows artists, designers, patternmakers, hobbyists, and others to draw a nearly infinite variety of curves quickly and easily. Crystal-Clear plastic is ideal for use on lightboxes and with CAD equipment. Made of durable, rigid plastic. Strategically placed positioning holes make it easier to use. Perfect for marking armholes and necklines Perfect for pattern alterations, garment alterations or any time a curve is needed Essential tool for fashion designers and pattern-makers Approximately 9" long.