Healthy size for ocellaris?

[Mimbler1]

I have a mated pair of ocellaris that I will have had for three years this September. They were very tiny tank bred clowns when I got them. They have their own 30 gal tank with a few stony's and soft corals. My question is concerning their size. The male is about an inch, and the female is only about an inch and a half long. Although they have never been sick, and are very vividly colored, they seem small from what others report their ocellaris to be. Also, they have never layed eggs. Does this sound like a nutritional problem, or should I just leave well enough alone?

Thanks for any words of wisdom!
Mike