Details: Multifunction, durable acrylic plastic French curve ruler with see through for good visibility. Made from transparent clear fluorescent yellow green high-quality cast acrylic with edge glow and vivid black and white graphics. For What: This ruler is an ideal tool for pattern design, drawing, beginner sewing projects, baby sewing patterns, custom clothing design, clothing patterns. This multifunction ruler has a French Curve, a straight ruler and a seam allowance ruler. Great for adding, adjusting or subtracting seam allowances. Blend design lines and create sewing patterns. The SA Curve rulers are designed to mark the seam allowance for fitting and measuring, add seam allowances on the European patterns and self-drafted patterns, as well as, blend design lines or change the size of the seam allowance. The overall dimensions are approximately 16 inches long by 6 inches tall and 1/8th inch in thickness. For Who: students, designers, patter maker, tailor, DIY. High quality sewing template tool made in the USA 100% Satisfaction.