What size is the RX7840V?

The Ray-Ban RX7840V measures 50□21 145 mm: 50 mm lens width, 21 mm bridge and 145 mm temples. The same numbers are printed inside the left temple of any pair you already own, so you can compare.

What is the RX7840V made of?

the ray-ban rx7840v has a peek frame, in full rim construction. The data comes from the brand item master, not from the photographs.

How does the RX7840V fit?

It has a high bridge fit and often suits round, oval and diamond face shapes. If you are between sizes, message us with the numbers from your current pair and we will check the fit with you.

Can I add prescription lenses?

Yes. Choose single-vision, progressive, reading or non-prescription lenses when you order, and upload or send your prescription afterwards. Our opticians check every order before the lenses are made.

Yes. Dubai Optical has been an authorised retailer since 1978. Every frame comes from the official brand distributor with its original case, cloth and warranty card.

RAY-BAN EYEGLASSES - RX7840V 5521 50 - Sand Gray

Ray-Ban Eyeglasses RX7840V

−30% off Price Dhs. 700

Was ~~Dhs. 1,000~~ · Inclusive of VAT

Or 4 × Dhs. 175 interest-free with

Colour Sand Gray 5521 3 colourways

Size: 50

Eyewear Size Guide

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

52 = Lens width (mm)
18 = Bridge width (mm)
140 = Temple length (mm)

Match these to the new frame for the most reliable fit.

Frame size example

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

Compare the listed size to your current frame stamp (e.g. 52□18–140). Look for something close: 51–53 lens, 17–19 bridge, 140–145 temple.
If between sizes, pick slightly larger for sunglasses and a closer match for optical.
Small adjustments (nose pads, temple bend) by an optician can fine-tune the fit.

4) What each number changes

Lens width: overall frame width and coverage.
Bridge: comfort on the nose; higher bridge = more space.
Temple length: behind-ear comfort; longer temples for larger heads or if temples feel tight.

5) Common size examples

Optical (unisex): 50–54 / 17–19 / 140–145
Sunglasses (unisex): 52–56 / 16–20 / 140–150
Smaller faces: start at lens width 48–50
Larger faces: look at 55–57

6) Still unsure?

Match your current frame numbers first.
Check our product photos and model notes (if available).
Message us your current size (e.g. 52□18–140) and preferred fit (snug / standard / relaxed). We’ll suggest options.

50 52

Dhs. 700 −30% ~~Dhs. 1,000~~

Deliver to Free in 1–2 working days

Product details

ShapeSquare
RimFull Rim
MaterialPEEK
Size50□21

The Ray-Ban RX7840V is a full-rim square eyeglass frame for men and women, with a peek frame. It comes with demo lenses, so you can add single-vision, progressive, reading or non-prescription lenses when you order. It has a high bridge fit and often suits round, oval and diamond face shapes. Available in 3 colourways; this one is Sand Gray (5521), in sizes 50 and 52.

Frame

Model code: RX7840V
Brand: Ray-Ban
Designed for: Unisex
Frame shape: Square
Rim type: Full Rim
Frame material: PEEK
Temple material: PEEK

Lenses

Lenses: Demo lenses — replaced with the lenses you choose
Lens curve: Base 4

Colour & size

Frame colour: Sand Gray
Colour code: 5521
Colourways: 3 available
Size: 50□21 145 mm
Size band: M

Fit & size

Lens width, measured across one lens — Lens width **50 mm**

Bridge width, the gap between the lenses — Bridge **21 mm**

Temple length, hinge to tip — Temple **145 mm**

Lens height, top to bottom of one lens — Lens height **42 mm**

Printed inside the temple as 50□21 145

Fit

Narrow Standard Wide

Size band M, as graded by Ray-Ban

Bridge: High Bridge Fit
Often suits: Round, oval and diamond face shapes

Compare with your current glasses

Enter the numbers printed inside the arm of a pair that fits you well.

Lens Bridge Temple

Returns & exchanges

7-day returnsWithin 7 days of purchase, at any branch. Unworn, in the original packaging, with the Dubai Optical authenticity tag attached.
14-day exchangesSwap for another style, size or colour in store, subject to availability.
RefundsTo the original payment method within 3–7 business days. Cash-on-delivery orders are refunded as store credit.
Prescription lensesFrames ordered with prescription lenses are made to order and cannot be returned.

Read the full return policy

Warranty & what's included

100% authenticSourced from the official brand distributors, with the brand's warranty card.
1-year warrantyManufacturer warranty against manufacturing defects.
Free aftercareAdjustments and cleaning at any Dubai Optical branch, for as long as you own the frame.

In the box

Original packaging
Case
Cleaning cloth
Warranty card

Contents can vary slightly by brand.

Payment options

CardsVisa, Mastercard and American Express.
WalletsApple Pay and Google Pay.
Pay in 4Tabby or Tamara, interest-free.
Cash on deliveryAvailable across the UAE.

Questions about the RX7840V

What size is the RX7840V?: The Ray-Ban RX7840V measures 50□21 145 mm: 50 mm lens width, 21 mm bridge and 145 mm temples. The same numbers are printed inside the left temple of any pair you already own, so you can compare.
What is the RX7840V made of?: the ray-ban rx7840v has a peek frame, in full rim construction. The data comes from the brand item master, not from the photographs.
How does the RX7840V fit?: It has a high bridge fit and often suits round, oval and diamond face shapes. If you are between sizes, message us with the numbers from your current pair and we will check the fit with you.
Can I add prescription lenses?: Yes. Choose single-vision, progressive, reading or non-prescription lenses when you order, and upload or send your prescription afterwards. Our opticians check every order before the lenses are made.
Is it authentic?: Yes. Dubai Optical has been an authorised retailer since 1978. Every frame comes from the official brand distributor with its original case, cloth and warranty card.