Hawaiian Koa 3A Curly Soprano Ukulele Back & Side 4-Piece Set #KOA-SP-BS-014
■ Product Description
Hawaiian Koa 3A Curly
Soprano Ukulele Back & Side 4-Piece Set
Item Number: KOA-SP-BS-014
This set features 3A (Medium Grade) Curly Hawaiian Koa (Acacia koa) from Hawaii Island, selected for Soprano Ukulele construction.
The wood features the distinctive golden-to-brown natural coloration of Hawaiian Koa, combined with attractive natural curly figure that changes in depth and appearance depending on the viewing angle and light.
This 4-piece set includes two bookmatched Back pieces and two Side pieces. The Back measures approximately 275 mm long, with a width of approximately 190 mm at the lower section and 180 mm at the upper section. The Sides measure approximately 405 mm long and 70–75 mm wide.
The natural grain and curly figure make this set an attractive choice for custom Soprano Ukulele construction and other acoustic instrument projects.
The wood is sourced directly from suppliers on Hawaii Island and supplied as part of an ongoing reforestation project.
■ Grade
3A (Medium Grade) Curly
■ Scientific Name
Acacia koa
■ Set Contents
-
2 Back pieces (Bookmatched)
-
2 Side pieces
Total: 4 Pieces
■ Size
Bookmatched Back
Approx. 275 × 180–190 × 3.9 mm
Width: Approx. 190 mm at the lower section / 180 mm at the upper section
Side
Approx. 405 × 70–75 × 3.6 mm
(Length × Width × Thickness)
The Back dimensions are measured with the bookmatched pieces opened and laid flat. These are not the dimensions of a single piece.
*The widths of the Back and Side pieces vary depending on the section of the wood. Please confirm that the available dimensions are suitable for
KOA
What Is Hawaiian Koa?
Why Is Everyone So Fascinated by Koa?
What Is Koa?
Hawaiian Koa (Acacia koa) is a remarkable wood that has been treasured by the people of Hawaii for centuries.
Traditionally used for outrigger canoes, paddles, boxes, and furniture, Koa is now highly valued worldwide as a premium tonewood for ukuleles and guitars.
It is known for its rich, warm tonal character and distinctive natural beauty.
The Rarity of Hawaiian Koa
Hawaiian Koa is a tree species native to Hawaii, with a naturally limited geographic range and a finite supply of harvestable timber.
Historical logging and changes in land use have affected Koa forests. High-quality lumber displaying exceptional curly figure is particularly rare and highly sought after.
Today, forest conservation and reforestation initiatives are helping support the future of this valuable Hawaiian resource.
Our Koa Grading System
Our grading system is based on decades of experience in the wood industry. We evaluate Hawaiian Koa primarily by the strength, depth, and visibility of its curly figure, providing a consistent reference to help customers compare and select lumber.
Little or no curl,
with subtle figuring
Moderate curl
visible at certain angles
Prominent curl
visible from most angles
Deep, strong,
highly defined curl
Exceptionally rare,
outstanding curly figure
Note: These grades are based on our own grading standards. As Koa is a natural material, color, grain patterns, and the appearance of curl may vary depending on the individual piece and lighting conditions.
Moisture Content & Drying
Some of our lumber comes from naturally fallen trees or logs that have been drying for extended periods after harvesting. Moisture content varies from piece to piece. Some lumber may be ready for processing, while other pieces may require additional drying or acclimatization.
Careful drying and gradual moisture adjustment help minimize the risk of checking, cracking, and warping.
Stack Properly
Use stickers between boards to allow air to circulate freely.
Ensure Ventilation
Avoid direct sunlight and sudden changes in temperature or humidity.
Circulate Air
Use fans when necessary to maintain gentle and consistent airflow.
Minimize Warping
Stack lumber carefully and use appropriate weights when needed.
Recommended Uses
With its beautiful grain and excellent versatility, Hawaiian Koa is suitable for a wide range of applications, from fine musical instruments to decorative woodworking and handcrafted accessories.
Ukulele & Guitar Making
Knife & Tool Handles
Pens, Small Crafts & Inlays
Boxes & Fine Woodworking
Dimensions & Tolerances
Because wood is a natural material, actual dimensions may vary slightly. The following measurement tolerances may apply depending on the product.
| Thickness | ±0.2 mm |
|---|---|
| Length | ±5 cm |
| Width | ±3 mm |
Natural lumber may not be perfectly square or uniformly shaped. Please allow for the natural characteristics of wood. Dimensions and conditions specified on individual product pages take precedence.
Detailed information
Tree species: ハワイアンコア
Usage: ウクレレ
Ukulele size: ソプラノ
Ukulele set: バック、サイド
Guitar size:
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Guitar grade:
Color:
Format:
Striped pattern:
Dimensions of top thickness:
Top width:
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Back thickness:
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Side thickness:
Side width:
Site length:
