It depends on your point of view. Too big for what? Big can come in different manners. # of people to watch when 1 or 2 can cause trouble. Size of assets.

It depends on your point of view. Too big for what? Big can come in different manners. # of people to watch when 1 or 2 can cause trouble. Size of assets. # of distinct businesses. Size of risk position. Size of counterparty risk.