Hi, I have a P bass with d'Addario Chromes flats. I can't remember the gauge, but the part of the strings near the tuners is blue. I think the gauge is 40-100 but I'm not sure. The general tension and gauge seems ok but I find the G string a little bit too loose and sometimes it goes out of the fretboard, if you know what I mean. I'm interested in both trying bigger strings of the same type or even changing brand. I love the feel of flats but I need a decent amount of definition in the attack, so I tried the Chromes first, which I like. Thanks.