Forbidden carnival costumes: If you don't get the right information, you could even end up in prison. Safety is the top priority especially in traffic, and overly bulky costumes may be restricted.
A monkey or a full-body dinosaur are not compatible with traffic. If there is a hindrance or danger, there may also be a violation of the general duty of care and a fine of up to ten euros is possible. There are also costumes that contain, for example, a swastika or other seditious or unconstitutional costumes.