I would suggest getting all smaller ones. Not tiny, but on the small (and certainly female) side. If they are very big, one or more will have probably started the change to male. If you have more than one male there is gonna be a rumble....
I like the lyretails because unlike most other anthias they do not require multiple daily feedings. Once established they do quite well on once a day, and can easily make it if you skip a day.