How do i know which string to buy for my acoustic guitar?

Author: classic-guitars  //  Category: Instruments - Guitars
kassy:) asked:


i bought an acoustic guitar and one of the strings broke off the string that broke off was located where string letter is D would be. If it helps the brand of the guitar is protocol. How do i know what strings to buy my guitar to replace the broken one? Please help im new to this!
um lol sorry i wanted to ask what stroe wud be the best to go to?