Product Details
Color Details
Size DetailsFrequently Asked Questions
What is Flexon memory metal technology?
Are Flexon 651 eyeglasses suitable for prescription lenses?
What face shapes work best with oval eyeglasses?
How do I choose between the 47mm and 49mm size?
Are half-rim glasses durable enough for everyday use?
What makes Flexon frames lightweight?
Compare With Similar Frames
How the Flexon 651 Eyeglasses stacks up against the closest alternatives we carry.
- Full-rim construction provides maximum lens protection
- Rectangular shape offers a bolder, more masculine look
- Slightly lower price point at $102.15
- Same lightweight half-rim construction as the 651
- Rectangular shape better for round faces
- Slightly lower price range ($96.62-$102.15)
Read the full comparison
Flexon 651 vs. Similar Models: Which Frame Is Right for You?
The Flexon 651 sits within Flexon's core numbered collection, alongside the 603 and 606 models. All three share the brand's signature memory metal technology, but they're designed for different style preferences and face shapes.
Flexon 651 vs. Flexon 603: Half-Rim Oval vs. Full-Rim Rectangle
The Flexon 603 offers a full-rim rectangular design targeted toward men, while the 651 features a half-rim oval shape designed for women. The 603's full rim provides maximum lens protection and a bolder look, but it's noticeably heavier than the 651's minimalist half-rim construction. If you prefer lightweight comfort and a softer, more versatile shape, the 651 is the better choice. The 603 works well for those who want a more substantial frame presence and don't mind the extra weight. Price-wise, the 603 is slightly less expensive at $102.15 versus the 651's $116.31.
Flexon 651 vs. Flexon 606: Oval vs. Rectangle in Half-Rim
The Flexon 606 is the closest comparison to the 651—both use the same lightweight half-rim construction with memory metal. The deciding factor is shape: the 606's rectangular lenses suit round and oval faces by adding definition, while the 651's oval lenses are more universally flattering across face shapes. The 606 is designed for men and comes in a wider range of sizes (52, 54, and 56mm lens widths), while the 651 offers women's sizing in 47mm and 49mm. If you have a rounder face and prefer sharper lines, consider the 606. For softer features or a more classic look, the 651 is ideal.
Why Choose the Flexon 651?
The Flexon 651 stands out for its combination of lightweight half-rim design, universally flattering oval shape, and refined color options (Blush, Coffee, Satin Burgundy) that lean more sophisticated than the utilitarian tones of the 603 and 606. It's the best choice if you want a frame that's comfortable enough to forget you're wearing it, versatile enough for any setting, and durable enough to handle daily wear without babying.
At a Glance
Flexon 603 Eyeglasses
Pros:
- Full-rim construction provides maximum lens protection
- Rectangular shape offers a bolder, more masculine look
- Slightly lower price point at $102.15
- Available in versatile colors including Matte Black and Gunmetal
Cons:
- Heavier than half-rim designs due to full frame
- Rectangular shape less universally flattering than oval
- Designed for men, may not suit all face shapes
- Full rim can obstruct peripheral vision slightly
Flexon 606 Eyeglasses
Pros:
- Same lightweight half-rim construction as the 651
- Rectangular shape better for round faces
- Slightly lower price range ($96.62-$102.15)
- Available in multiple sizes (52, 54, 56mm) for broader fit range
Cons:
- Rectangular shape less versatile than oval for various face shapes
- Designed for men, styling may not suit all preferences
- Sharper angles less forgiving on angular faces
- Larger size options may overwhelm smaller faces