Like all guitar makers, Ibanez installs a variety of frets depending on model. But, from what I can find, most of them are in the "jumbo" class or larger. So, you could probably be happy with a 6105 or even a 6100 size fret, if that's what you're looking for. If all else fails, take a dial caliper to a guitar shop that sells the things and measure them for yourself. Takes 45 seconds. If they've been dressed, the dimensions won't match up to any standard size, but they'll be close enough to tell you what they started with.