De or het leenbrief?

The correct Dutch article is:

de leenbrief

How to use leenbrief

the leenbriefde leenbrief
this leenbriefdeze leenbrief
that leenbriefdie leenbrief
our leenbriefonze leenbrief
your leenbriefjouw leenbrief
every leenbriefelke leenbrief
which leenbrief?welke leenbrief?
a big leenbrief / the big leenbriefeen grote leenbrief, de grote leenbrief