D'Addario Prelude Cello String Set, 3/4 Scale, Medium Tension Solid steel core optimized to create the warmest-sounding student strings available Educator's preferred choice for student strings due to their unique blend of warm tone, economy, and durability 3/4 size cello with a playing length of 25 1/2 inches (650mm) Medium tension All D'Addario strings are designed, engineered and manufactured in the USA