I think they can get longer than 2 feet. I have some from the Amazon Basin – but they are still babies – I think they are about 4 years now. The book Turtles of the World Vol. 3 (South America) suggest 60-82cm (2-2.75 feet). My understanding is the ones from Peru and Bolivia can grow much larger (over 3 feet). My female is growing much faster than my male (Well the ones I think are female and male) and hopefully they will start to breed in the next two years.

Mine live with me in my apartment and follow my girlfriend around the house – they tend to search for her when let free in the living room.