What is the correct size condom for a 13 year old?

Go to a CVS or Walgreens and go to where the condoms are and buy one package of regular size Trojan condoms then buy a box of magnum Trojan condoms, and if the magnums are too small then they have XL and XXL Trojan condoms.

There are so many types and styles of condoms, you should find what is best for you by trying different ones.