Original Ray-Ban 4257 Replacement Lenses

Original Ray-Ban RB4257 replacement lenses

Bring your Ray-Ban RB4257 sunglasses back to life without buying a new frame. These original Ray-Ban replacement lenses restore the look, fit and sun protection of your sunglasses at a much lower cost than a full replacement pair, with free shipping included.

Model compatibility

These lenses are made for the Ray-Ban RB4257 model. The lens shape is Phantos, the curve is Base 6, and the product is intended for adult sunglasses. For a clean, secure fit, the model number and size on your frame must match the option you select.

We do not recommend fitting these lenses into lookalike or imitation frames. Even if the sunglasses look very similar, small differences in the groove, rim tension or lens outline can prevent a correct installation.

How to identify your model and size

Open the temple arm and check the inside printing. You should find RB4257 followed by the size information. This product shows size 53 and diameter 53 mm; the technical attributes also include diameter 56 mm, so always choose the exact available variant shown on the product page.

If you are unsure, send us a clear photo of the inside temple before shipment. Our optical team checks Ray-Ban references every day and can help you avoid ordering the wrong size.

Main features

• Brand: Ray-Ban.
• Compatible model: RB4257.
• Product type: original.
• Listed size: 53.
• Listed diameter: 53 mm and 56 mm depending on variant.
• Lens material: polycarbonate.
• Shape: Phantos.
• Lens curve: Base 6.
• Use: sunglasses.
• Audience: adult.
• UV400 protection: blocks 100% UVA/UVB rays.

Available colours

• B8 - silver gradient mirror - plastic.
• B9 - copper gradient mirror - plastic.

Using the official colour reference is the safest way to keep the original appearance of your sunglasses. If you are looking for original Ray-Ban lenses, matching the correct code is more reliable than comparing screen images.

Material, protection and lens finishes

These lenses are made from polycarbonate, a lightweight and resistant material widely used in sunglasses. The Base 6 curve preserves the correct geometry of the RB4257 and helps the lens sit properly in the frame when installed correctly.

The available lens options combine a mirror finish with a gradient effect: B8 in silver gradient mirror and B9 in copper gradient mirror. Both are sun lenses with UV400 protection, blocking 100% of UVA and UVB radiation.

Why replace only the lenses

If your Ray-Ban RB4257 frame is still in good condition, replacing the lenses is the smart option. You can save up to 60% compared with buying new sunglasses, reduce waste and keep the frame that already fits your face.

ReplacementLenses.net has repaired more than 600,000 glasses and processed over 400,000 orders in more than 50 countries since 2018. Our own workshop in Granada uses professional MEI Easy Fit Trend equipment and qualified opticians.

Authenticity and logo

Because these are original Ray-Ban lenses, they include the Ray-Ban logo. Choosing original lenses helps avoid the typical issues of generic replacements: poor fit, unstable colours, weak finishes and uncertain optical protection.

Each lens is checked by qualified opticians with a lensmeter in our workshop. As an official EssilorLuxottica distributor, we provide the extra confidence of genuine sourcing and professional optical handling.

Frequently asked questions

Will these fit every Ray-Ban RB4257?
They fit Ray-Ban RB4257 sunglasses when the size and selected variant match your frame. Always check the inside temple before ordering.

Where do I find the size?
The size is printed inside the temple arm next to RB4257. This product lists size 53, so if the marking is hard to read, send us a photo and we will check it before shipping.

Can I use them on a similar non-original frame?
We do not advise it. Original Ray-Ban lenses are cut for the exact RB4257 groove, and imitation frames often differ enough to cause poor fit or frame stress.

Are these glass or polycarbonate lenses?
According to the product attributes, these RB4257 lenses are polycarbonate. That makes them lightweight, comfortable and resistant for everyday sunglass use.

Do they provide UV protection?
Yes, they provide UV400 protection, blocking 100% of UVA and UVB rays. This is one of the key reasons to choose original Ray-Ban lenses instead of unverified alternatives.

Can I install them at home?
The RB4257 should be handled carefully so the frame is not forced. If you have no experience, we recommend visiting an optician or using controlled pressure with gentle heat only when suitable for the frame.

Are polarized lenses available?
Only choose a polarized option if the product variant is clearly marked as polarized. The colours listed here are B8 and B9 gradient mirror options.