How old are we?

[LuciferRoo]

I just bought 5 pullets earlier this week.
The seller said they were about 2 months old, but they look younger to me.
Anyone dare to take an expert guess?
There are 4, which I am told are Mar Bar.
I don't remember what the white one is, but also some version of a green laying cross.

 

[Cloverr39]

I'd guess around 1.5 – 2 months based on my own chicks at the moment.