100% NewFit for regular size of classical guitar greatlyThe Guitar Strings are in the material as follows: 3 strings in Clear Nylon; 3 strings in Nylon Core with Silver-Plated Copper Alloy WoundSpecifications:E string -1st Clear Nylon .0285" 0.72mmB string -2nd Clear Nylon .0325" 0.83mmG string -3rd Clear Nylon .041" 1.04mmD string -4th Silver-Plated Copper Wound .030" 0.76mmA string -5th Silver-Plated Copper Alloy Wound .036" 0.91mmE string -6th Silver-Plated Copper Alloy Wound .044" 1.12mmPackage Include:1set Guitar Strings Set