Etroplus suratensis Breeding Size Question

[Nuchal Man]

Hi everyone. I was recently offered a group of 4 mid size (4-5 inch) Green Chromides by a friend. I always liked the Etroplus fish but my goal is to breed every fish I have. The only thing stopping me from pulling the trigger on these beauties is I go of to college in a 8 months and don't want to work with any fish I won't have a chance to spawn due to maturity/size. So my question is what size do the Etroplus suratensis have to be to breed?

Thank you,

Sam