Size A2 Bone Saddle. This acoustic guitar bone saddle will fit many Alvarez® Artist Series or Guild® Westerly Series guitars with undersaddle pickups as a replacement or upgrade. The saddle is compensated for improved intonation, and with the radius set at 16 inches to match fretboards and improve playability. Dimensions – Length: 72 mm. Thickness: 3.2 mm. Height: 8 mm. Radius: 16 inches. Compensated B with Slanted Bass Compensation.