Concert Ukulele. The Solid Acacia line bears curling that is similar to its close relative Koa. The Acacia's resemblance to its cousin is apparent in its beautiful, varied grain pattern. The all solid wood allows the sound to improve as it is broken in. The Solid Acacia line bears curling that is similar to its close relative Koa. The Acacia's resemblance to its cousin is apparent in its beautiful, varied grain pattern. The all solid wood allows the sound to improve as it is broken in. Scale Length: 14.875 inches, Overall Instrument Length: 24.125 inches, Body Length: 11.125 inches, Number of frets: 18, Width at upper bout: 6 inches, Width at lower bout: 8.25 inches, Width at waist: 4.875 inches, Body Depth: 2.75 inches, Fingerboard width at nut: 1.39 inches, Fingerboard width at neck/body joint: 1.73 inches. Case included. Finish: Natural Satin.