B 31 realms.

 Here is the 31 Realms of Existence in clear table form (Theravāda Buddhist cosmology):

🔻 Kāma-loka (Sense-Sphere Realm) – 11 Realms

#	Realm	Pāli Name
1	Hell Realms	Niraya
2	Animal Realm	Tiracchāna-yoni
3	Hungry Ghost Realm	Peta-loka
4	Asura Realm	Asura-loka
5	Human Realm	Manussa-loka
6	Four Great Kings	Cātummahārājika
7	Thirty-Three Gods	Tāvatiṃsa
8	Yāma Devas	Yāma
9	Tusita Heaven	Tusita
10	Devas Delighting in Creation	Nimmānarati
11	Devas Controlling Others’ Creations	Paranimmitavasavatti

🔹 Rūpa-loka (Form Realm) – 16 Realms

First Jhāna

#	Realm	Pāli Name
12	Brahma’s Retinue	Brahma-pārisajja
13	Brahma’s Ministers	Brahma-purohita
14	Great Brahma	Mahā-brahmā

Second Jhāna

|15 | Minor Luster | Parittābha |

|16 | Infinite Luster | Appamāṇābha |

|17 | Radiant Luster | Ābhassara |

Third Jhāna

|18 | Minor Aura | Parittasubha |

|19 | Infinite Aura | Appamāṇasubha |

|20 | Steady Aura | Subhakiṇha |

Fourth Jhāna

|21 | Great Reward | Vehapphala |

|22 | Mindless Beings | Asaññasatta |

|23 | Durable Pure Abode | Aviha |

|24 | Serene Pure Abode | Atappa |

|25 | Beautiful Pure Abode | Sudassa |

|26 | Clear-Sighted Pure Abode | Suddassī |

|27 | Highest Pure Abode | Akaniṭṭha |

🌫️ Arūpa-loka (Formless Realm) – 4 Realms

#	Realm	Pāli Name
28	Infinite Space	Ākāsānañcāyatana
29	Infinite Consciousness	Viññāṇañcāyatana
30	Nothingness	Ākiñcaññāyatana
31	Neither Perception nor Non-Perception	Nevasaññānāsaññāyatana

Summary Structure

• 11 Sense-Sphere Realms
• 16 Form Realms
• 4 Formless Realms
• Total = 31 planes of existence

If you’d like, I can also create a visual hierarchy chart for easier memorization.