According to the question on amazon, it says it comes with 9s so you can get 9-42s. In terms of brand, you can go ernie ball or daddario since those are common recommended brand. If you want to use amazon, you can pick https://www.amazon.com/Ernie-Ball-Super-Slinky-Nickel/dp/B0002M6CW6/ref=sr_1_1?crid=2ASR70Y8L54BS&dchild=1&keywords=ernie%2Bball%2Belectric%2Bguitar%2Bstrings&qid=1606353526&sprefix=ernie%2Bball%2Caps%2C156&sr=8-1&th=1