Catherine Hiriart, better known around town as “Catherine H.,” opened her eponymously named boutique for women on the Parkway in Katonah nearly four years ago. “Our goal is to help our clients find themselves through fashion,” Ms. Hiriart said.

The store, an instant hit, was and remains a tasty mélange of classy, relaxed California-style apparel with a saucy European twist. Now, Ms. Hiriart is turning her attention to menswear with her new shop called HIM by Catherine H., located around the corner on Katonah Avenue.