I have a set of GHS Boomer .12-.52's on my Hamer Studio. I usually use .11's on my Fender scale guitars so I went up to keep the tension the same. Debating whether or not I want to go back down to .11's but I still have at least 5 packs of the .12's left. My Hamer Cruise has the .45-.105 Rotosounds on it.