Maui Jim · Sunglasses
Maui Jim Kōkua 638
$199.00
Polarized frame price. Add prescription lenses further down this page.
Color
Matte Black — 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
- 638
- Colour code
- 638-02
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 Kōkua 638 at a glance
Maui Jim Kōkua 638 is a polarized sunglass on a base-4 curve and made in Japan. Sizing is 54 mm per lens, 16 mm at the bridge and 140 mm at the temple, a Large fit on Maui Jim's face-size scale, in four colourways with PolarizedPlus2 MauiPure lenses. Prescription lenses can be built on this page, from +5.00 to -7.50 in Maui Evolution 1.67. The lens is 40.5 mm tall.
Specifications
| Style number | 638 |
|---|---|
| Eye size (A) | 54 mm |
| Bridge (DBL) | 16 mm |
| Temple | 140 mm |
| Lens height (B) | 40.5 mm |
| Base curve | 4 |
| Face size (Maui Jim) | Large |
| Lens | MauiPure, PolarizedPlus2 |
| Made in | Japan |
| 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 | $199.00 |
Compare with similar models
| Maui Jim Aeko 886 | Sized 55-16-140 mm (Kōkua: 54-16-140) on the same base-4 curve; the same -7.50 limit for minus prescriptions; Maui Jim face size Medium (Kōkua: Large). |
|---|---|
| Maui Jim Kahiko 635 | Base 4, 53-16-145 mm against 54-16-140; prescriptions to -8.50 at most (Kōkua: -7.50). |
| Maui Jim Blossom 892 | Same base-4 curve as Kōkua, at 54-18-145 mm against 54-16-140; the same -7.50 limit for minus prescriptions; Maui Jim face size Medium (Kōkua: Large). |
Description
Description
Polarized MauiPure | Born in Hawaii
Kōkua is a rectangular, rectangle full frame built in nylon. A saddle bridge and a traditional pin hinge carry the front. Made in Japan.
Lenses are MauiPure with PolarizedPlus2 polarization. The frame runs 54mm across the eye on a 16mm bridge, with 140mm temples, sized for a large face. Prescription lenses can be built on this page in any of Maui Jim's Rx materials and tints.
Four colorways:
- Matte Black with Neutral Grey lenses
- Matte Petrol Blue with Blue Hawaii lenses
- Matte Black with Gradient with MauiGreen lenses
- Matte Dark Havana with HCL Bronze lenses
SIZING INFORMATION:
Eye Size (A): 54.0mm
Bridge Size (DBL): 16mm
Temple Length: 140mm
Vertical Size (B): 40.5mm
Base Curve: 4
PRODUCT DETAILS:
Lens Material: MauiPure
Rx Power Range: +3.00 to -5.50
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 measurements of the Maui Jim Kōkua?
What are the measurements of the Maui Jim Kōkua?
Each lens is 54 mm wide on a 16 mm bridge, with 140 mm temples and a 40.5 mm lens height. Maui Jim's own face-size label for it is Large. Check them against the size printed inside the temple of glasses you wear now, keeping in mind that bridge shape and adjustment matter too.
What frame and lens colours does the Kōkua come in?
What frame and lens colours does the Kōkua come in?
The listed frame and lens pairings are Matte Black with Neutral Grey, Matte Petrol Blue with Blue Hawaii, Matte Black with Gradient with MauiGreen and Matte Dark Havana with HCL Bronze lenses.
How strong a prescription fits the Maui Jim Kōkua?
How strong a prescription fits the Maui Jim Kōkua?
Maui Jim's ranges vary by lens material: +5.00 to -7.50 in Maui Evolution 1.67; +3.00 to -5.50 in MauiBrilliant, Maui Evolution 1.60, polycarbonate and MauiUltra. The +3.00 to -5.50 in the product details is the MauiBrilliant, Maui Evolution 1.60, polycarbonate and MauiUltra range. Check lens suitability for your prescription with an optician before ordering.
What is the difference between Kōkua and Aeko?
What is the difference between Kōkua and Aeko?
Aeko: sized 55-16-140 mm (Kōkua: 54-16-140) on the same base-4 curve; the same -7.50 limit for minus prescriptions; Maui Jim face size Medium (Kōkua: Large). The table on this page also compares Kahiko and Blossom.
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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