FRAME SIZE (MM) 56 16 44 141 Frame size: Medium · View Size Guide
Take a quick 30-second face scan — we'll show this frame on your face and get your exact fit.
Try Frame on Your FaceMake a confident impression with the Jet Black Flat-Top Square Eyeglasses, designed for men who prefer bold, structured optical styling. The distinctive flat-top brow creates a strong horizontal profile, while the square silhouette delivers a contemporary and masculine appearance.
Finished in a deep Jet Black tone, the acetate construction gives the frame a clean, substantial look that pairs naturally with both formal and casual wardrobes. The full-rim design provides stable lens support while maintaining the strong visual character of the frame.
The Jet Black Flat-Top Square Eyeglasses can be customized with prescription lenses according to your vision requirements.
The flat-top brow gives this square frame its distinctive character. The strong upper line creates a confident profile while the structured lower corners maintain the geometric identity of the design.
The deep Jet Black finish provides a timeless foundation for the bold silhouette. It works effortlessly with business suits, smart-casual clothing, denim and everyday wardrobe essentials.
The full-rim acetate construction provides a practical foundation for everyday optical use. Its structured design offers a noticeable visual presence while remaining versatile enough for regular professional and casual wear.
If you prefer eyewear with a strong architectural profile rather than a subtle minimalist frame, the Jet Black Flat-Top Square Eyeglasses are designed to make an impact. The combination of a flat-top brow, square geometry and deep black acetate creates a confident and timeless men's eyewear style.
Nations Optics offers customizable eyewear designed around individual vision requirements and personal style. Select the appropriate lens configuration and personalize your eyewear for your everyday needs.
| Color | Black |
|---|---|
| Glasses Size | Medium |
| Eyewear Type | Full Rim |
| Eyewear Shape | Rectangular |
| Front Rim Material | Carbon Fiber |
| Temple Material | Acetate + Metal |
| Size In MM | 56-16-44-141 Size Guide |
| Est. Wt. Grams(excl. Glasses) | 23.00 |
Rimless frames require holes drilled directly into the lens to attach the frame. Regular lenses can easily crack or shatter at these drill points, which could be unsafe for your eyes.
Polycarbonate lenses are 10x more impact resistant than standard lenses — they won't crack during drilling or from accidental drops. They're virtually unbreakable and lightweight.
We use them for rimless frames purely for your safety and lens longevity — so you never have to worry about cracked or broken lenses.
Frame quality
Every frame listed on our website passes a thorough quality check before it goes live. We inspect, measure, and verify each model — so the specs you see on the product page are exactly the specs you receive.
What we check on every frame
Hinges are tested for flex strength and snap-back precision. Only frames meeting minimum flex cycle standards are listed.
Flex testedNose pads are checked for material finish, grip texture, and secure attachment — ensuring all-day comfort without slipping.
Comfort verifiedMetal frames are verified for alloy grade, finish uniformity, and resistance to corrosion and bending under normal use.
Grade verifiedSheet frames are inspected for surface clarity, colour consistency, and resistance to warping or surface cracking.
Material inspectedLens width, bridge width, and temple length are physically measured in mm and verified against the product page listing.
mm accurateEach frame's weight is measured on a precision scale and listed on the product page — so you know exactly what to expect.
Gram accurateIf you receive a frame that does not match the listed specifications — in material, size, or weight — we will replace it or refund you in full within 10 days of delivery. No arguments, no hassle.
Frequently asked
Rimless eyewear
Yes — and it is easier than you think. Nations Optics offers a free custom lens shape selector on every polycarbonate lens product page, built specifically for rimless frame wearers.
Rimless frames require holes to be drilled directly into the lens to hold the frame in place. Standard lens materials can crack or shatter at these drill points — which is why Nations Optics exclusively uses polycarbonate lenses for all rimless frames. Polycarbonate is 10x more impact resistant than regular lenses, virtually unbreakable, and handles precision drilling without weakening — keeping your eyes safe and your lenses lasting longer.
When you order a polycarbonate lens on any product page, you will see a "Choose Lens Shape" button. Select the shape that matches your rimless frame — Aviator, Butterfly, Rectangular, Oval, Square, and more — and our team will precision-cut your lenses to fit that exact shape. If your order also includes a rimless frame from our collection, the same shape is automatically applied and fitted for you.
Why polycarbonate only
Rimless frames require drilling directly into the lens. Only polycarbonate can handle this without cracking — keeping your lenses safe and durable.
Where to find it
On every polycarbonate lens product page, tap "+ Choose Lens Shape" before adding to cart. Pick your shape and we handle the rest.
No extra charge
Custom lens shape cutting is included at no additional cost. The price you see is the price you pay — shape selection is completely free.
Select your shape on the product page. If your order includes a rimless frame, the same shape is precision-cut and fitted directly into your frame before dispatch — all included in your order price.