Brochures are a common and effective form of communicating with people.
The first type is designed to attract a new customer's attention. It should have strong visuals with a distinct call to action.
The second type is designed to follow through with customers who want more detailed information. This brochure will include enough text to communicate what they need to know.
The most standard size brochure is a six-panel piece. However, if you want to expand the number of panels or produce a completely unique size, the only limit is what you can think of.