De or het blafbrief?

The correct Dutch article is:

de blafbrief

How to use blafbrief

the blafbriefde blafbrief
this blafbriefdeze blafbrief
that blafbriefdie blafbrief
our blafbriefonze blafbrief
your blafbriefjouw blafbrief
every blafbriefelke blafbrief
which blafbrief?welke blafbrief?
a big blafbrief / the big blafbriefeen grote blafbrief, de grote blafbrief