Wholesale Supply

SETS below are EXAMPLES ONLY - They are NOT FOR SALE. Guitar and Ukulele sets are NOT sold online. Please contact us for current availability. There is a minimum $1,500 purchase. We will send pictures of the sets we chose for final approval before shipping.

We specialize in large size and custom orders and will ship worldwide. We have decades of experience and know the issues to export around the world.

Mahalo for your understanding.

Koa Guitar Sets

We manufacture Hawaiian Koa guitar sets for all guitar sizes. Winkler Woods supplies figured, curly and high grade Hawaiian Koa, Hawaiian Mango, Hawaiian Milo, Hawaiian Kamani, Hawaiian Monkey Pod, Hawaiian Cuban Mahogany, and sometimes various fruit and nut trees which make great tonewoods

We also specialize in Japanese exotic tonewoods such as Tochi (Horse Chestnut), Sakura (Cherry), Kurumi (Walnut), Kuri (Chestnut), Kaki (Persimmon), Shiro Kaki (Black and White Persimmon), and occasionally Black and White Ebony Wood

We also stock Indian Rosewood, and Spruce and Cedar Top material.

inquire or request a custom order. See Grades of Koa to learn more about our tonewood grading system.

Grade 3A - Medium Curl

Koa Guitar Set #1 Jumbo Acoustic Guitar

A sample look of our Koa guitar set for jumbo acoustic guitar. This set has inclusions of back + side and the Hawaiian Koa tonewood used is grade 3A (Medium Curly Koa). We produce Koa acoustic guitar sets for other grades as well 2A, 4A and 5A.

Grade: 3A Medium Curl
Size: Jumbo
Sets: Back + Side
Specie: Hawaiian Koa

Grade 3A - Medium Curl

Koa Guitar Set #2 Jumbo Acoustic Guitar

Another sample look of our Koa guitar set for jumbo acoustic guitar. This set has inclusions of top + back and the Hawaiian Koa tonewood used is grade 3A (Medium Curly Koa). We produce Koa acoustic guitar sets for other grades as well 2A, 4A and 5A.

Grade: 3A Medium Curl
Size: Jumbo
Sets: Top + Back
Specie: Hawaiian Koa

Grade 4A - Heavy Curl

Koa Guitar Set #3 Jumbo Acoustic Guitar - Complete Package

A sample look of our complete Koa guitar set for jumbo acoustic guitar. This set has inclusions of top + back + side and the Hawaiian Koa tonewood used is grade 4A (Heavy Curly Koa). We produce Koa acoustic guitar sets for other grades as well 2A, 3A and 5A.

Grade: 4A Heavy Curl
Size: Jumbo
Sets: Top + Back + Side
Specie: Hawaiian Koa

Grade 4A - Heavy Curl

Koa Guitar Set #4 Jumbo Acoustic Guitar - Complete Package

Another sample look of our complete Koa guitar set for jumbo acoustic guitar. This set has inclusions of top + back + side and the Hawaiian Koa tonewood used is grade 4A (Heavy Curly Koa). We produce Koa acoustic guitar sets for other grades as well 2A, 3A and 5A.

Grade: 4A Heavy Curl
Size: Jumbo
Sets: Top + Back + Side
Specie: Hawaiian Koa

Master Grade 5A - Super Curl

Koa Guitar Set #5 Jumbo Acoustic Guitar - Complete Package

Another sample look of our complete Koa guitar set for jumbo acoustic guitar. This set has inclusions of top + back + side and the Hawaiian Koa tonewood used is master grade 5A (Super Curly Koa). We produce Koa acoustic guitar sets for other grades as well 2A, 3A and 4A.

Grade: 5A Super Curl
Size: Jumbo
Sets: Top + Back + Side
Specie: Hawaiian Koa

Master Grade 5A - Super Curl

Koa Guitar Set #6 Jumbo Acoustic Guitar

A sample look of our Koa guitar set for jumbo acoustic guitar. This set has inclusions of back + side and the Hawaiian Koa tonewood used is master grade 5A (Super Curly Koa). We produce Koa acoustic guitar sets for other grades as well 2A, 3A and 4A.

Grade: 5A Super Curl
Size: Jumbo
Sets: Back + Side
Specie: Hawaiian Koa

Our Sourcing of Hawaiian Koa Tonewood for Acoustic Guitar Sets


Winkler Woods is capable to supply Hawaiian Koa acoustic guitar sets as wholesale for business-to-business and retail for luthiers. Our sourcing of high grade and curly Hawaiian Koa came from the Big Island of Hawaii. We harvest and salvage Hawaiian Koa trees that were damaged by natural environmental factors, most of the time we can find them in the summits of Mauna Loa, then process the woods as logs to be turned into lumber, tonewood, and veneer. We do all the processing from green to final product in our workshop on Oahu, Hawaii. Since newly harvested Hawaiian Koa still has a high amount of moisture content within, we will then prepare the Koa wood for treatment and drying process. The time duration of drying and finishing "green" Koa can take up to six to eight months depending on the condition of the wood.

Curly Koa Acoustic Guitar Grades: Medium, Heavy and Super Curl


Our Hawaiian Koa tonewood for acoustic guitar sets in different sizes such as orchestra model and jumbo are cut quarter sawn and we measure their qualities by curl, size, figure, stripness and color. Koa wood is graded by strength and depth of curl or evidence of figure and character, this is our way to determine the grade level of a Koa tonewood piece. Master Grade 5A being the highest because of the tonewood's strong and deep curl within the template. A Koa tonewood with stronger and deeper curl is more expensive because it produce better sounds.

➤ Super Curl (Master Grade 5A) - Excellent, strong, deep curl no less than 90% and no blemishes within the template.
➤ Heavy Curl - strong curl and figure, usually throughout the entire plate, generally visible from all angles.
➤ Medium Curl - pervasive curl yet may disappear or look stronger at certain angles or have bald spots.

Send us an email for your inquiries at