Soprano 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: 13.625 inches, Overall Instrument Length: 20.875 inches, Body Length: 9.375 inches, Number of frets: 12, Width at upper bout: 5.125 inches, Width at lower bout: 7 inches, Width at waist: 4.5 inches, Body Depth: 2.375 inches, Fingerboard width at nut: 1.375 inches, Fingerboard width at neck/body joint: 1.675 inches. Case included. Finish: Natural Satin.