Maui Jim · Sunglasses
Maui Jim Kahana 640
$419.00
Polarized frame price. Add prescription lenses further down this page.
Color
Shiny Dark Ruthenium — Made to OrderLens Colour
Ships with Maui Jim PolarizedPlus2® polarized lenses in the tint shown in the photos for the frame colour you choose.
Want a different lens colour without a prescription? Contact us — custom lens colours can be ordered and take about a week.
This item is made to order — please allow additional time for us to prepare it. Contact us for a specific estimate on this piece.
This colourway is currently out of stock.
Want prescription lenses in this frame instead? Add your Rx below.
Some tints are made in certain lens materials only — availability narrows with the material selected above.
Progressive lenses require at least 15mm.
Your Prescription
Name, email and shipping are collected at checkout — no need to enter them twice.
- Style
- 640
- Colour code
- GS640-17
Gazal Eyecare is an authorized Maui Jim dealer and a luxury independent boutique optical in Roswell, GA. Call ahead to plan an eyewear consultation at our Roswell boutique.
76 Norcross Street, Suite B, Roswell, GA 30075 · Call or text (470) 729-2020
Maui Jim Kahana 640 at a glance
Maui Jim Kahana 640 is a polarized sunglass on a base-4 curve. It measures 53 mm per lens, 19 mm at the bridge and 145 mm at the temple, with PolarizedPlus2 MauiBrilliant lenses; Maui Jim rates it Large for face size. The widest prescription range on this page is +5.00 to -7.50, in Maui Evolution 1.67 lenses. The lens is 43.5 mm tall.
Specifications
| Style number | 640 |
|---|---|
| Eye size (A) | 53 mm |
| Bridge (DBL) | 19 mm |
| Temple | 145 mm |
| Lens height (B) | 43.5 mm |
| Base curve | 4 |
| Face size (Maui Jim) | Large |
| Lens | MauiBrilliant, PolarizedPlus2 |
| Prescription range | +5.00 to -7.50 in Maui Evolution 1.67; +3.00 to -5.50 in MauiBrilliant, Maui Evolution 1.60, polycarbonate and MauiUltra |
| Price | $419.00 |
Compare with similar models
| Maui Jim Kaulike 687 | The same 53-19-145 mm size and base-4 curve as Kahana; prescriptions to -8.50 at most (Kahana: -7.50). |
|---|---|
| Maui Jim Half Moon 890 | Base 4, 53-20-145 mm against 53-19-145; the same -7.50 limit for minus prescriptions; Maui Jim face size Medium (Kahana: Large). |
| Maui Jim Kenui 642 | Sized 53-18-145 mm (Kahana: 53-19-145) on the same base-4 curve; prescriptions to -8.50 at most (Kahana: -7.50); Maui Jim face size Medium (Kahana: Large). |
Description
Description
Make the most of your adventures. Modern square Kahana elevates classic styling with unparalleled performance. Designed with MauiBrilliant, experience soaring views in clear, vibrant detail every day.
Frame Details: Exclusive PolarizedPlus2 lens technology; Signature native pattern engraved on titanium frame front rim and on rubber temple tips; Signature slash at hinge and temple tips and on dual finish titanium nose pads
SIZING INFORMATION:
Eye Size (A): 53.0mm
Bridge Size (DBL): 19mm
Temple Length: 145mm
Vertical Size (B): 43.5mm
Base Curve: 4
PRODUCT DETAILS:
Lens Material: MauiBrilliant
Face Size: Large
Free standard shipping on orders $250+. Most eyewear ships made-to-order with your prescription — exact ship dates confirm after checkout. Need it faster? Express shipping is available.
Frequently Asked Questions
What are the lens and bridge sizes of the Kahana?
What are the lens and bridge sizes of the Kahana?
The measurements are 53 mm (lens), 19 mm (bridge) and 145 mm (temple), with a 43.5 mm lens height. Maui Jim's own face-size label for it is Large. Compare these numbers with the ones printed inside the temple of glasses that fit you; bridge shape and adjustment matter too.
What lenses does the Kahana use?
What lenses does the Kahana use?
Stock lenses are MauiBrilliant with Maui Jim's PolarizedPlus2 polarization. Each lens is 53 mm wide and 43.5 mm tall, on a base-4 curve. The frame is listed in Shiny Dark Ruthenium, Matte Black and Matte Brown.
What prescription range can the Maui Jim Kahana take?
What prescription range can the Maui Jim Kahana take?
By lens material, Maui Jim's published ranges are +5.00 to -7.50 in Maui Evolution 1.67; +3.00 to -5.50 in MauiBrilliant, Maui Evolution 1.60, polycarbonate and MauiUltra. An optician should confirm that the lens suits your prescription.
What is the difference between Kahana and Kaulike?
What is the difference between Kahana and Kaulike?
Kaulike: the same 53-19-145 mm size and base-4 curve as Kahana; prescriptions to -8.50 at most (Kahana: -7.50). Half Moon and Kenui are in the comparison table on this page as well.
Is this frame 100% authentic?
Is this frame 100% authentic?
Yes. Gazal Eyecare is an authorized dealer for every brand we carry — Jacques Marie Mage, Lindberg, Kuboraum, Akoni, Anne et Valentin, Thierry Lasry, Maui Jim, and our house brand Gazal Eyewear. Every frame is 100% authentic and sourced directly, with full manufacturer support.
How long does shipping take?
How long does shipping take?
- Standard Orders: Ship as soon as ready and arrive within 3–7 business days (domestic).
- Prescription Orders: Ship immediately upon completion of your custom lenses.
- Special Orders & Pre-Orders: Require additional production time. For example, custom LINDBERG frames are ordered directly for you and take roughly 4–5 weeks to arrive before lens crafting begins.
What is your return policy?
What is your return policy?
All sales are final and we do not offer monetary refunds on any brand — many of our pieces are one-of-a-kind or very small production. At our discretion we may offer store credit on file, or a one-time exchange (fees may apply). What we can offer, and any fees, depend on the brand, on whether the item is custom or made-to-order, and on any lens customizations — prescription lenses, tints and coatings are made specifically for you, so they are custom and generally non-returnable. To be considered, contact us within 3 days of delivery for shipped orders, or 3 days of purchase in store; items must be unworn and in original condition with the original case and packaging. Store credit never expires; once a store credit has been used, that purchase is final.
Can I try these on virtually before I buy?
Can I try these on virtually before I buy?
Yes, try our Custom Lens Builder tool and use the virtual try-on option to see the frame on your own face before ordering.
About Maui Jim
At Gazal Eyecare, we curate only the finest eyewear, and we are proud to be the first official online partner for Maui Jim. Crafted for those who demand both cutting-edge sun protection and refined style, Maui Jim sunglasses are the gold standard for polarized sunglasses—eliminating glare while enhancing color, clarity, and contrast. Whether you're on the water, driving, or enjoying the outdoors, Maui Jim’s proprietary PolarizedPlus2® lens technology ensures that your eyes remain protected with unmatched visual clarity.
Why Choose Maui Jim Sunglasses?
The advanced polarized lenses reduce glare from surfaces like water, snow, and pavement, making them an essential choice for outdoor enthusiasts and anyone who values crisp, vivid vision. Unlike traditional tinted lenses, Maui Jim’s technology enhances natural colors rather than muting them, giving you a more dynamic and vibrant world.
At Gazal Eyecare, we believe that sunglasses should do more than just shield your eyes—they should elevate your entire experience. Our partnership with Maui Jim allows us to offer an exclusive selection of their most sought-after styles, available to shop with the expertise and service you can only find at Gazal.
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