My flock of four RIR two are now laying.
One since she was 17+ weeks and the other started at 19+ weeks.
We are now 20+ weeks and they are the only two laying, but I get consistant 2 eggs a day. They are still pretty small, but the most recent egg is long like an XL but skinny.. prob a double yoker.
I have one SLW that is same age, and nothing from her yet.