Most columbian boas reach about 7ft, of course there are exceptions that grow to 10 but you have to feed for that. Then there are the dwarf boas; Caulker Cay boas=5ft, Tarahumara Mt boas=4ft, Corn Island boas=5ft, Nicaraguan boas=5ft, Sonoran desert boas 5ft. There are also hog islands but I'm not sure their max length. Hope that helps. My resource was an april 2004 issue of reptiles magazine.

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