What size should a vanguard be?

Correct me if I'm wrong. The vanguard party theory states that evidently, not every single proletarian will have class consciousness at the point of the revolution, therefore the class-conscious proletarians should lead it, no matter if it's a relatively small group, right?

There are so many radlibs despite worsening material conditions that sometimes I wonder if these people will ever be able to gain class consciousness. As far as I understand, the whole point of a vanguard party is that we can do without these people on our side, right?