Cincy, is that your tank? If so, you have some incredible specimens! How big is that sohal and miniatus?
Lazy, the largest dogface I've personally seen was right at 6", but they will reach 10-12" if given the right requirements. Some of the Arothron ssp. puffers get larger than others, so just be prepared to have a large enough tank to house a fish that can get to be the size of a football when full grown...