Hawaiian Koa 4A+ Curly Wood – Suitable for Tenor & Concert Ukulele Tops #KOA-970
■ Product Description
Hawaiian Koa 4A+ Curly
Suitable for Tenor & Concert Ukulele Top Material
Item Number: KOA-970
This is a rare 4A+ (High-Mid Grade) Curly Hawaiian Koa piece featuring the distinctive golden-to-brown natural coloration and beautiful three-dimensional curly figure characteristic of high-grade Hawaiian Koa.
The natural curly figure changes with the viewing angle and light, revealing impressive depth, movement, and natural character across the surface of the wood.
Measuring approximately 43 mm thick, 400 mm long, and 140–190 mm wide, this substantial piece can be resawn and processed into Top material for both Tenor and Concert Ukuleles.
Its generous thickness and width also provide excellent flexibility for custom cutting and processing, making it suitable for other musical instrument components, fine woodworking, and a variety of specialty craft projects.
The wood is sourced directly from suppliers on Hawaii Island and supplied as part of an ongoing reforestation project.
■ Grade
4A+ (High-Mid Grade) Curly
■ Scientific Name
Acacia koa
■ Size
Approx. 400 × 140–190 × 43 mm
(Length × Width × Thickness)
■ Wood Information
Species: Hawaiian Koa
Scientific Name: Acacia koa
Origin: Hawaii Island, State of Hawaii, USA
■ Suitable for Tenor & Concert Ukulele Top Material
This piece has sufficient dimensions to be resawn and processed into Top material for both Tenor and Concert Ukuleles.
The actual number of usable pieces and final dimensions will depend on the saw kerf, cutting orientation, desired finished thickness, and individual instrument design.
Please confirm the required dimensions for your intended ukulele design before cutting.
■ Features
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Rare 4A+ (High-Mid Grade) Curly Hawaiian Koa
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Suitable for resawing into Tenor & Concert Ukulele Top material
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Substantial 43 mm thickness
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Generous 140–190 mm width
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Rich natural golden-to-brown coloration
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Beautiful three-dimensional curly figure
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Excellent flexibility for custom cutting and processing
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Directly sourced from Hawaii Island
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Supplied as part of a reforestation project
■ Recommended Uses
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Tenor Ukulele Top material
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Concert Ukulele Top material
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Ukulele construction
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Custom instrument making
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Musical instrument components
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Fine woodworking and craft projects
A rare 4A+ Curly Hawaiian Koa piece with substantial dimensions and beautiful three-dimensional figure, offering excellent potential for resawing into Tenor and Concert Ukulele Top material as well as other high-quality custom woodworking applications.
Why Is Everyone Obsessed with Koa?
You may often hear people talk about “Koa,” but what exactly is it?
Hawaiian Koa is one of the most prized and iconic tonewoods in the world, valued for both its beauty and sound quality.
About Hawaiian Koa Wood
Hawaiian Koa (Acacia koa)
Hawaiian Koa is a special wood that has been treasured by the Hawaiian people for hundreds of years.
Historically, it was used to make:
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Outrigger canoes
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Paddles
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Boxes
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Furniture
Today, Hawaiian Koa is highly regarded worldwide as a premium material for musical instruments such as ukuleles and guitars.
It is known as an excellent tonewood, producing a rich, warm, and balanced tone with beautiful visual character.
About Scarcity
Hawaiian Koa has a very limited supply due to extensive logging in the past.
Large-scale reforestation efforts have only begun relatively recently.
As a result, high-quality Hawaiian Koa is becoming increasingly rare every year, especially highly figured material.
About Grading
Grading Information
Our grading system is based on over 50 years of experience handling and supplying tonewood.
It is our own internal quality standard.
In the general market, terms such as “4A” and “5A” are widely used, but grading criteria vary from company to company.
By understanding our grading system, you can be confident that each grade meets a consistent and reliable quality level.
Grade Criteria (Simple)
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1A–2A: No curl to very weak curl
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3A: Medium curl visible at certain angles
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4A: Strong curl visible from any angle
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5A: Master grade with deep, beautiful curl
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5A+: Extremely rare, top-tier figure
Moisture Content & Drying
Our wood comes from naturally fallen trees or logs that have been air-dried in the forest for long periods.
Because of this, some pieces are ready to use, while others may require additional drying.
Hawaiian Koa is known as a wood that dries easily and is resistant to cracking and warping compared to many other tonewoods.
Easy Drying Method
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Place the wood so air can circulate freely
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Store in a well-ventilated area
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Use a fan to circulate air if needed
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Place a light weight on top to reduce movement
For material 20–30 mm thick, the recommended drying period is approximately 2 months in a well-ventilated environment.
Recommended Uses
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Ukulele making
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Knife and tool handles
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Pens, accessories, and inlays
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Box and small craft production
Measurement Notes
Because this is a natural wood product, the following dimensional variations may occur:
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Thickness: ±0.2 mm
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Length: ±5 cm
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Width: ±3 mm
The material is not a perfect rectangular prism, which is a natural characteristic of solid wood.
Please understand this before purchasing or processing.
Detailed information
Tree species: ハワイアンコア
Thickness:
Length:
Width:
Backing:
Number of leaves:
Made to order: KOA-970