Hey Erin
Is it possible to see pictures of your frogs up near a measuring tape? Your frogs (as eggs) were laid July 25, 2010 - morphed into frogs by Early September...So they have been morphed just about 13 months... ACFs size can range 3-5" in body....
My mother in law has 2 of your frogs' siblings - the male is just about 2.5" - 3" but the female is over 4.5"...and they are in a 20 long together and fed reptomin every other day and bloodworms once a week. Some frogs just grow differently and their mama was a Massive frog - one of the biggest I have ever had!