250mm Waist width, and 12 boots........If you pull it off it'll be close. You would need wide angles, and a wide stance, which considering the kind of riding the X is made for, that's probably not what you want.
The Custom X Wide is really only a mid-wide (259mm) So it won't hardly feel that different under your feet, and not having the toe and heel hang will be worth it. Plus it looks exactly the same, except the Wide version has a Black top sheet rather than white. No big deal.