How do you tell how big a chick is?

[DragonClaw01]

I'm trying to remember the age of the chickens I have now, Rosecomb leghorn pullets, and got them on 11/04/13, they were mostly fully feathered, long legged and only needed chick starter for a few more weeks, until the bag emptied(25 lbg) and I had around 12 in all(including one bantam rooster and one bantam hen), and then be put on layer pellets. I'm guessing they were a month old or so, the last of the season and they sold them to me at a discounted price so they didn't have to watch them anymore. Can anyone post pictures of "chick stages"?

 

[red horse ranch]

I don't have any pictures but if they were fully feathered they were probably at least 6 weeks old. But leghorns do feather out really quick.