De or het randversiering?

The correct Dutch article is:

de randversiering

Rule Words ending in -ing: almost always de. See the rule

How to use randversiering

the randversieringde randversiering
this randversieringdeze randversiering
that randversieringdie randversiering
our randversieringonze randversiering
your randversieringjouw randversiering
every randversieringelke randversiering
which randversiering?welke randversiering?
a big randversiering / the big randversieringeen grote randversiering, de grote randversiering