housing two female flower horns

Can i house two female flower horns in the same tank ? Even if ones 8" the other 4 to 5" also if i can what size tank at the least could i do that in

That is kind of a tough call since the flowerhorns can vary so much in size and aggression. I would not try the mix in anything smaller than a 75g. But to try and keep peace you are better off with a 6ft tank of some sort (125g+) and dither fish to help spread aggression out.