Originally Posted by
kwermuth
By icf 5x5, I assume you mean Jason Blahas program?
Before anyone could give a fully satisfactory answer they would need info like how much you squat, bench press, deadlift and press; what you weigh, your age and gender. What you eat might also be useful.
All of that being said, have you looked at the SS program. It has significantly less volume in everything, so you could probably do it for longer. You can always gain the size you want later. Consider SS a short term investment. It will make getting big easier later on.