With a name like Thieves' Cave, you can imagine what the climbing is like here. And while you would be right in thinking that it's severely overhanging, the climbing is actually not on the Thieves' Cave(s). Those are a little bit touristy and something that hikers can go look into. They're smaller and visible from Oberes Diebesloch.
With the exception of the Namaste tower which is 22m, the majority of the routes here are between 12 and 16m tall. Thus, short and powerful climbing.

Park at the parking area indicated for Kleinziegenfelder Tal 1.