Storm, just one last shot.....There is a proper way to hold, support the ball, and deliver it. If your technique is to grip and throw, you will never get a "proper" fit. Hopefully there is someone in your area that knows how to properly hold and deliver the ball. Search him or her out. If you understand how to hold and support, deliver the ball, fit becomes a bit secondary. The bowlers who understand this, all they want is the holes to be big enough for their fingers and thumb. One last warning, don't be fixated on a "perfect" grip. There is no such thing.