Originally Posted by Alienbetta1
Yes, you must keep him by himself or with females of the same kind8).
No! Never keep males and females together, unless you're planning to breed them. And you need to do tons of research before you even consider breeding...
I couldn't tell if you were joking or not.
Anyway, from my experience, bettas come in all different sizes. My CT Renard is so tiny! I'm think maybe 1.5 inches. My female Gloria is quite a hulk compared to him at nearly 3 inches. I've kept both of them for relatively the same amount of time.