Mathieu Castanier is an internationally recognized master tailor and fashion designer known for blending the disciplined craftsmanship of traditional bespoke tailoring with a distinctly modern vision. As founder and creative director of his eponymous house, he has built a reputation for creating one-of-a-kind garments that feel as effortless as they are impeccably constructed.

His journey began on London’s legendary tailoring street, where he was trained within the exacting British bespoke tradition. There, he mastered the fundamentals of structure, balance, and precision from hand-drafted patterns to full-canvas construction and meticulous hand-finishing. That classical foundation was later refined alongside Italian sartorial masters, whose softer shoulders, higher armholes, and natural drape introduced him to a new language of ease, comfort, and fluid elegance.

Today, Mathieu’s work is defined by this dual heritage: the architecture of British tailoring meeting the relaxed sophistication of Italian craft. His atelier offers a complete bespoke wardrobe suits, jackets, shirts, leather pieces, and custom shoes all cut from unique patterns and refined through multiple fittings to achieve a perfectly balanced silhouette that moves with the wearer rather than against them.

While deeply rooted in handcraft, Mathieu is also an early adopter of advanced tools. His studio integrates a 3D configurator and high-definition digital design to preview proportions, fabrics, and finishing options long before the first cut is made accelerating decision-making while preserving the integrity of bespoke craftsmanship. Technology, however, is always in service of the client: every decision ultimately comes back to the hand, the eye, and the dialogue between tailor and wearer.

Over the years, he has dressed a discerning international clientele that includes business leaders, finance professionals, artists, and entertainers who seek more than a garment: they look for a wardrobe that