The size will be from half an inch to 1 inch or more (egg laying stage).
See the picture above.. the white sacks are developing eggs.
And if you look closely, one of them is laying eggs... in a circular pattern.
I just took that picture last night.
Due to a large demand, everyone will receive at lest one egg layer adult.
This should get you started.
I'll give you quick instructions once I meet you.