Ray-Ban RB3757 Kai Oval Sunglasses
On orders over Dhs 500
Offer ends in
Base 2 on a metal oval, so it sits almost flat rather than curving with the face — an unusual choice that keeps the line clean in profile. 56mm or 59mm wide, 34mm to 36mm deep, on a narrow 15mm bridge with adjustable pads. Four of the thirteen are polarised. Pale gold and gunmetal read quieter than the plain gold and silver, and the yellow mirror with a gold flash is the one that changes the frame completely.
Most of our frames are “one size,” designed to fit a wide range of faces. A few styles come in multiple sizes. Use your current glasses as the best reference, or follow the quick steps below.
1) How to read frame size (on your glasses)
Look inside the temple (arm). You’ll see numbers like: 52□18–140
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52 = Lens width (mm)
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18 = Bridge width (mm)
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140 = Temple length (mm)
Match these to the new frame for the most reliable fit.
2) Quick fit by face width (no glasses handy?)
Use a ruler (millimeters) across your face at the pupils, or try the “credit-card test” (a card is ~54 mm wide).
| Face width | Typical lens width | Typical bridge | Temple length |
|---|---|---|---|
| Narrow | 48–51 mm | 15–18 mm | 135–140 mm |
| Medium | 52–54 mm | 16–19 mm | 140–145 mm |
| Wide | 55–57 mm | 17–21 mm | 145–150 mm |
Tip: Sunglasses often run 1–2 mm larger than optical frames for a comfortable, slightly looser fit.
3) One-size frames—how to choose
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Compare the listed size to your current frame stamp (e.g., if you wear 52□18–140, look for something close: 51–53 lens, 17–19 bridge, 140–145 temple).
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If between sizes, pick slightly larger for sunglasses and closer match for optical.
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Small adjustments (nose pads, temple bend) by an optician can fine-tune the fit.
4) What each number changes
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Lens width: overall frame width/coverage.
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Bridge: comfort on the nose; higher bridge = more space.
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Temple length: behind-ear comfort; longer temples for larger heads or if temples feel tight/short.
5) Common size examples
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Optical (unisex): 50–54 / 17–19 / 140–145
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Sunglasses (unisex): 52–56 / 16–20 / 140–150
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Smaller faces: start at lens width 48–50
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Larger faces: look at 55–57
6) Still unsure?
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Match your current frame numbers first.
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Check our product photos on model notes (if available).
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You can message us your current size (e.g., 52□18–140) and preferred fit (snug/standard/relaxed)—we’ll suggest options.
Ray-Ban
Aviation optics turned archive
Ray-Ban began in 1937 as aviation eyewear engineered by Bausch & Lomb for US Army Air Corps pilots. Its catalogue is still built on archive shapes rather than seasonal designs — Aviator, Wayfarer, Clubmaster and Round are all in continuous production.
Est. 1937
Product details
- ShapeOval
- RimFull Rim
- MaterialMetal
- Size56□15
The Ray-Ban RB3757 Kai is a full-rim oval sunglass for men and women, with a metal front, metal temples and nylon lenses. It has an adjustable nosepads fit and often suits square, diamond and oblong face shapes. Available in 8 colourways (Silver / Yellow Mirror Flash Gold, 003/6D, Gunmetal / Azure Polarised, Gold / Dark Brown, Pale Gold / Green, Gunmetal / Dark Violet, Pale Gold / Dark Grey Polarized and Pale Gold / Dark Grey) and 2 sizes (56 and 59).
Base 2 on a metal oval, so it sits almost flat rather than curving with the face — an unusual choice that keeps the line clean in profile. 56mm or 59mm wide, 34mm to 36mm deep, on a narrow 15mm bridge with adjustable pads. Four of the thirteen are polarised. Pale gold and gunmetal read quieter than the plain gold and silver, and the yellow mirror with a gold flash is the one that changes the frame completely.
Frame
- Model
- Kai
- Model code
- RB3757
- Brand
- Ray-Ban
- Designed for
- Unisex
- Frame shape
- Oval
- Rim type
- Full Rim
- Frame material
- Metal
- Temple material
- Metal
Lenses
- Lens material
- Nylon
- Lens treatment
- Mirrored, Polarized
- Lens colour
- Yellow Mirror Flash Gold
- Polarised
- Photochromic
- Lens curve
- Base 2
Colour & size
- Frame colour
- Silver
- Colour code
- 003/6D
- Size
- 56□15 145 mm
- Size band
- L
Fit & size
Printed inside the temple as 56□15 145
Fit
Size band L, as graded by Ray-Ban
- Bridge
- Adjustable Nosepads
- Often suits
- Square, diamond and oblong face shapes
Compare with your current glasses
Enter the numbers printed inside the arm of a pair that fits you well.
Delivery & pickup
- 4-hour expressDubai only, on orders placed before 5 pm, Monday to Friday.
- Free UAE deliveryAll emirates, 1–2 working days.
- Collect in storeFrom Dubai Festival City, Ibn Battuta Mall, Outlet Mall and Festival Plaza. Find a branch
Returns & exchanges
- 7-day returnsUnworn, in the original packaging, with the OptiVision tag still attached.
- 14-day exchangesSame conditions — swap at any of our branches.
Warranty & what's included
- 1-year warrantyManufacturer warranty against manufacturing defects. Keep the warranty card from the box.
- Lifetime aftercareFree, unlimited cleaning and adjustments at any of our branches.
In the box
- Original packaging
- Hard case or soft pouch
- Cleaning cloth
- Warranty card
Contents can vary slightly by brand.
Payment options
- CardsCredit and debit cards, processed by Network International.
- WalletsApple Pay, Google Pay and Samsung Pay.
- TabbySplit into 4 interest-free payments.
- Cash on deliveryPay when your order arrives.
