Dr. Leila Kelleher is a fashion scholar and designer whose work focuses on size-inclusive design, sustainable fashion, and the application of biomechanics in apparel development. She holds a PhD in Biomechanics and uses interdisciplinary approaches to challenge exclusionary norms in fashion design and education.

She is the co-founder of the Size Inclusion in Fashion (SIF) Lab, which fosters research, industry partnerships, and curriculum development to advance equitable practices in fashion. Her book, Plus Size Patternmaking for Womenswear, is the first dedicated textbook on plus-size patternmaking, offering technical methods that reflect the needs and proportions of plus-size bodies.

Leila is also the co-founder of Muna and Broad, a plus-size sewing pattern brand, and A Space, In Between, a global plus-size luxury fashion brand based in Japan. Her second book, Size-Inclusive Sustainable Fashion, currently under contract, critically examines the limitations of mainstream sustainability discourse and offers new frameworks for inclusion. Leila is Assistant Professor of Fashion Design at Toronto Metropolitan (formerly Ryerson) University and Parsons School of Design.