By default, Excerpt Length is set to 55 words. But, there is a filter hook with a name
excerpt_length which you can override the default Excerpt Length.
However, there are certain scenarios where you’ll need different excerpt length for different post types used in the WordPress website. So, to overcome this scenario, I’ve prepared a code snippet using the filter
excerpt_length which you can easily set your own excerpt length for each of your post types used.