Hey Mike,
The name "orange ball anemone" is usually applied to a corallimorph species (Pseudocorynactis caribbeorum) and is a caribbean species although we do have similiar species here and they probably are called the same thing.
Not sure exactly what you have in mind as there are a great many members of the Pseudocorynactis here in the Philippines. But on average they get no bigger than palm sized or smaller although I've seen one species here that had me fooled into thinking it was an anemone species as it was very large.
In other words, it is really hard to answer that question given so many species to choose from.
Do you have one now? or just thinking about getting one? Keep in mind also that some are nocturnal or cryptic while others require light.
Just a few images that I found to try and give you an idea of what I am talking about...lol
http://www.poppe-images.com/images/sear ... %20species
Chuck