Sounds like mine have some way to go then, they are all scalare angels. I have had them for 9 months now, so would hazard a guess that they are about a year old. I have 2 males who are about 5-6" including fins, and a female who is a little smaller.
I need to get back into the habit of giving mine a more varied diet, they still get variety, just not as much as they used to.
I don't have any recent pics, but I think the biggest of mine may be a similar size to your angel rich. Might have to take some new pictures later.