De or het strandpyjama?

The correct Dutch article is:

de strandpyjama

How to use strandpyjama

the strandpyjamade strandpyjama
this strandpyjamadeze strandpyjama
that strandpyjamadie strandpyjama
our strandpyjamaonze strandpyjama
your strandpyjamajouw strandpyjama
every strandpyjamaelke strandpyjama
which strandpyjama?welke strandpyjama?
a big strandpyjama / the big strandpyjamaeen grote strandpyjama, de grote strandpyjama