I got mine about 2 months ago at 2 inch baby now the one is almost 4 inchs the smallers on is tuching 3 inch , i feed them a jmc catfish pellets and the bigger one is getting fat now about 1 inch deep . They grow fast .
the biggest pictus i have seen was 6 inches (my own btw) the biggest 4 line was 8 inches that i have seen. and the biggest ornate was like 11-12 inches at the local aquarium.