D'Addario Prelude A string, 1/4 scale, nickel wound, medium tension cello string. I accidentally purchased the wrong size. This is a 1/4 size. - Brand: D'Addario - Model: Prelude - Instrument Type: Cello - Scale Length: 1/4 - String Type: Nickel wound - Tension: Medium - String Number: A - Product Code: J1011 1/4M Thank you for looking.