Get length of the teaser I need to get the setting on what length the teaser of a custom made content type is set.

I tried Google'ing for it, but so far I have ziltch results.
I also tried looking in the database, in the field_config_instance, field_config and the variable tables, but they couldn't give me a value either...

Now, I'm hoping you experts could help me to point me to the right direction?
Would be appreciated. :-)

Thanks in advance.
Please check ReadMoreControl module, this might help you..By this module you can add Read more links to other supported view modes