Cirrus clouds typically occur at altitudes between 5,000 and 13,000 meters (16,400 to 42,600 feet).

However, it's important to note that the specific height can vary depending on latitude and other factors.

* Higher altitudes: Cirrus clouds tend to be higher in the tropics and lower in polar regions.

* Cirrus spissatus: A dense variety of cirrus clouds called "cirrus spissatus" can extend down to 3,000 meters (9,800 feet).

* Cirrostratus: Thin, sheet-like cirrostratus clouds can extend even higher, sometimes reaching up to 18,000 meters (59,000 feet).

So, while the general range is 5,000 to 13,000 meters, keep in mind that there can be significant variations.