As the first gaṇa can contain 4 varieties of gaṇa, the 2nd 5 varieties of gaṇa; the 3rd 4 varieties of gaṇa again, etc., we can calculate the total number of possible varieties of Āryā like this 4 × 5 × 4 × 5 × 4 × 2 × 4 × 1 × 4 × 5 × 4 × 5 × 4 × 1 × 4 × 1, which is equal to 81,920,000 varieties of Āryā metre!

Āryā Pathyā (ChŚā, VR), Ariya Pathyā (Vutt)

The Āryā Pathyā structure is distinguished by the placement of the caesura at the end of the 3rd gaṇa.

Āryā Vipulā (ChŚā, VR), Ariya Vipulā (Vutt)

The Āryā Vipulā structure has the caesura elsewhere, or not at all.