The thickness of the Earth's crust varies greatly depending on location. Here's a breakdown:

* Oceanic crust: Typically 5-10 km thick.

* Continental crust: Ranges from 30-70 km thick, with some areas reaching up to 80 km.

Average thickness: A rough average for the entire Earth's crust is around 35 km.

It's important to note that the crust is much thinner than the Earth's other layers, the mantle and the core. The mantle alone extends to a depth of about 2900 km, while the core is about 2900 km thick.