The group is kept deliberately small in order to give everyone a chance to get into the conversation.
Editions were kept very small, and never went above 40.
They have less power than government ministers, and their private armies are kept small by law.
Therefore the number of members had to be kept small, manageable.
To provide enough detailed evidence for such a study, the number of participants was kept reasonably small.
The number became big, fast, because it was kept small at first.
In many districts, elementary schools are kept small so students can walk to school.
The size of the camp is kept relatively small to allow the children more personal attention.
"Apparently the number of people who are allowed to know about this will be kept small."
In the beginning, the groups were kept small partly for practical reasons.