Okay i need to know the sizes of alan wrenches(keys) to set my action on my Ibanez. Its a Rg2550E with an edge pro tremolo.

You need a big alan key and a very small alan key as well

let me know what the small size is please!!!!
right,,,,your being very vague here. But the smallest allen key I've every used on a guitar is a 2 mm,,,might be it. Pictures would be nice so that we actually know what your getting at

Why not just go out and buy a multi set of allen keys? one of them will fit