I have 2 both have been measured recently. One is 28" the other 29".
Here are a couple of pics taken yesterday by Rusty Wessel when he was visiting me.
pic#1 the 28" one hovering above a 72" 150 lb Arapaima arapaima
pic#2 the 29" with a shoal of Paraneetroplus syspilum 8" to 12"
Very nice, at what size did the royals spots start to "royal" up? I have a 9" supposed RCK but with his current pattern im thinking hes just a regular ck