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Choosing the right eyewear can be a complex process. This guide will help you find your best match. All eyewear has different functional and aesthetic characteristics, so we use three pieces of information to determine the following:
If you need help finding the right size, try our Size Advisor:
The size of the frame counts as functional information, which is defined by one principal number:
This information defines the following sizes:
| Hinge to hinge (in) | Hinge to hinge (mm) | Size |
|---|---|---|
| <4.8 | <121 | XXS |
| 4.8-4.9 | 121-124 | XS |
| 4.9-5 | 125-128 | S |
| 5.1-5.2 | 129-132 | M |
| 5.3-5.4 | 133-136 | L |
| 5.4-5.5 | 137-140 | XL |
| >5.5 | >>140 | XXL |
Try our Size Advisor and we'll measure it for you! Or, you can use a ruler to measure the hinge-to-hinge distance of a pair of glasses that you already own.
If you already own a pair of glasses, you’ll find numbers engraved on the inside of the eyewear temple. These numbers indicate the following:
The first number is the model name, followed by the lens width and bridge width.
There is usually a third number that represents the temple length, or the measurement of the "arms" of your frame.
Sometimes there is a fourth number that indicates the lens height.
Each of these numbers is measured in mm.
Fitting is aesthethical information which determines the amount of face coverage for a given size.
The frames shown in the image are all the same size but each one has a different fit.
The three possible fittings are:
The four bridge and nosepads options are:
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RAY-BAN
RB5451 Optics
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Choose your vision need and add your prescription.
Select lens type and thickness, then add specialized treatments.
Enjoy through aftercare with our 30 day happiness guarantee.
Frame
Material: Acetate
Shape: Square
Color: Havana
Product measurements
Size: 52 - 20 One size only
Lens width: 52 mm / 2.05 in
Bridge width: 20 mm / 0.79 in
Temple length: 145 mm / 5.71 in
Lens
Treatment: Clear
Color: Clear
The RB5451 eyeglasses bring timeless Ray-Ban design to life with a vintage-inspired key bridge and square glasses frames defined by sharp angles and clean lines. Crafted from lightweight plastic with acetate temples, they ensure all-day comfort without compromising on style. The tortoise eyeglasses front adds a touch of classic charm, making these Ray-Ban glasses a versatile choice for any look.
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