Presented by Ardor Eyewear, the Michael Kors Bierzo MK4140U embodies authentic designer eyewear and contemporary luxury eyewear for women. This square frames, full-rim eyeglass exudes urban polish with a refined balance of form and function. The injected front delivers a lightweight, smooth silhouette, while the temples are crafted in metal for lasting strength and a premium hand-feel. Finished in Black with a Demo Lens to preview prescription vision, the Bierzo provides an exceptional base for prescription-ready customization. For those who value heritage, craftsmanship, and enduring style, this frame offers an elevated everyday signature.

Frame details: size 54, bridge 17, lens height 43, temple length 140, front material Injected, temple material Metal, lens base 4. The frame is universal fit, ensuring comfort across a range of face shapes. Its square frames silhouette paired with a full rim creates a modern, confident look that works seamlessly from meetings to evenings out.

Available colours and variations: this model is listed with the Bosco colour variant alongside the Black front option. The Bosco shade adds subtle nuance to the timeless silhouette, while maintaining the frame’s versatile appeal for both work and leisure.

Face shapes: guided by the frame geometry, this design flatters oval and heart-shaped faces most naturally, while those with round features may appreciate its defined angles, which add structure and balance to the overall profile.

Prescription-ready service: on Ardor’s product page you can choose frame only or frame with prescription lenses. We will fit your personalised lenses and ship your order in 8–12 days with authentic manufacturer packaging, backed by Ardor’s guarantee of genuine designer eyewear.