Umbrella can be divided into different parts below in sizes and in various materials. Through different combination umbrella category could be diversified.

Length and number of the rib and the diameter when opened generally define the size of umbrella. All except the common umbrella which consists of 8 ribs, there is a serial type of umbrellas with 5, 6, 7, 10, 12, 14, 16, 24 ribs and so forth.