Musiclily Alice Stainless Steel Phosphor Bronze Folk Acoustic Guitar 6-string Strings Set, Light Fit for regular size of the acoustic guitar greatly The Guitar Strings are in the material as follows: 2 strings in Stainless Steel; 4 strings in Steel Core with Coated Copper Alloy Wound Specifications:E string -1st Stainless Steel .012" 0.3mm;B string -2nd Stainless Steel .016" 0.41mm;G string -3rd Coated Copper Alloy Wound .024" 0.61mm;G string -3rd Coated Copper Alloy Wound .024" 0.61mm; G string -3rd Coated Copper Alloy Wound .024" 0.61mm Package Included: 1 Set Acoustic Guitar String