How Old Are These Rhode island Reds Chicks?

[HousyRunner]

How old are these Rhode Island Reds? I bought them from a local distributor 12 days ago and he said they were only a couple of days old. But they've gotten feathers, have begun to fly, and have gotten big quickly, and I now suspect they are older. Any ideas? It doesn't matter other than I'm looking to better understand their development and match that up with their age.

 

[Izzymoon]

about 2 weeks maybe 2-1/2

Here is mine at that age

 

[Fierlin1182]

They look a little like my chicks did when they were 3 weeks old.
These RIRs are three weeks old: https://www.backyardchickens.com/t/162892/3-week-old-rir-sex-please
Yours maybe just a tad younger.

 

[A.T. Hagan]

Two to two and a half weeks looks to me.