An internationally recognized expert in design and construction techniques for haute couture and ready-to-wear. She is a designer for Vogue Patterns, a frequent contributor to Threads and Vogue Pattern Magazine, and the author of numerous books, including Couture Sewing Techniques, Sewing for the Apparel Industry, and Claire Shaeffer’s Fabric Sewing Guide. She was the consultant for couture construction for The Museum of the City of New York’s online exhibit, Worth & Mainbocher. She frequently uses her large collection of vintage garments for inspiration and research when writing and designing.