Here is a concise summary of the discussion on the largest Titans in the anime "Attack on Titan", limited to Titans over 17m in size:
**Featured Titans (by size):**
1. **Founding Titan (Ymir/Final Form Eren)**: Estimated 1,000m to 15,000m in size, with the ability to spawn any Titan from its bones.
2. **Rod Reiss' Titan**: 120m to 170m, known for its unusual behavior and immense strength.
3. **Colossal Titans**:
* **Armin's Colossal Titan**: 60m, possessed explosive power.
* **Berthold's Colossal Titan**: 60m, highly muscular and known for its destructive abilities.
* **Eren's Colossal Titan (Final Form)**: 60m, utilized explosive power and exceptional strength.
**Other Mentions:**
* **Wall Titans**: 50m (estimated), a series of Titans forming a three-layered wall protecting Paradis Island.
* **The First Titan (Ymir)**: Original size unknown, estimated to be massive (comparable to the Founding Titan's size) based on the "cloud theory".
Here are the extracted key facts, each numbered and in short sentences, excluding opinions:
**Titan Sizes and Types**
1. Only Titans over 17m in size are discussed in this context.
2. Wall Titans are approximately 50m in height, possibly 45m.
3. Colossal Titans are on average 60 meters tall.
4. Rod Reiss' Titan form is estimated to be 120-170m in size.
5. Ymir's (Founding Titan) size is approximated to be 450-900m, potentially up to 1000m with cloud formation.
6. Eren's final Titan form is estimated to be around 1000m to 15,000m in size.
**Titan Abilities and Strengths**
7. Colossal Titans have powerful explosive abilities.
8. Rod Reiss' Titan form could generate extremely hot air and had unique movement patterns.
9. Ymir (Founding Titan) demonstrated immense strength, easily defeating ancient Marleyan troops.
10. Eren's final Titan form can spawn any Titan from any generation within his bones.
**Character and Event Facts**
11. Berthold was chosen as the heir to the Colossal Titan after a selection process.
12. Berthold was sent to Paradis Island to seize the Founding Titan.
13. Berthold destroyed the outer wall of Paradis Island, which had stood for 100 years, with a single kick.
14. Armin Arlert gained the power of the Colossal Titan after eating Berthold.
15. Rod Reiss hid after the attack on Wall Maria and sought the Founding Titan's location.
16. Historia Reiss rejected the offer to reclaim the Founding Titan's power.
17. Rod Reiss transformed into a massive Titan (120-170m) after consuming a spilled liquid.
18. Historia Reiss eventually killed her father, Rod Reiss, by slashing his weak point.
19. Ymir became the first Titan after encountering a strange creature in a pool of water.
20. Ymir's power was divided into 9 after being eaten by his three daughters.
21. Eren gained his final Titan form after touching the "Eiger check" with permission from a royal blood heir.