How old are these aruacana chikens?

[atiram]

a friend of mine ordered them, and she doesnt really know how old they are. the person she brought them from said 5 weeks, but i think they look a lot older.

what do you think?

 

[azygous]

It would have been better to have a close-up of just one chick and a ruler next to it for scale.

But going by the complete set of feathers they appear to have, I will say anywhere from five to eight weeks of age.