A full grown male betta can be anywhere from 1" to 2" in size.
forme giant betta is fast and has a big muse lol
They look just like Big betta fish, but smaller.
The Betta probably likes BIG spaces best
a betta bowl is about 12-15 inches in length and about the same in height
most likely around 4 inches
No
About the size of a pin head.
it looks like they have a big bubble in their side
As big as you can get
The average is 1.5 inches
A crowntail is a beta fish with a teardrop-shaped fan tail. The tail of a crowntail beta distinguishes it from other betas. The crowntail is a Siamese fighting fish that grows to 1.5-inches in length.
Most likely. I would wait until the little betta is around 3 cm (3/4 inch) Make sure the betta's are the different sex because two males will fight (often until death)