De or het offertetje?

The correct Dutch article is:

het offertetje

Rule Diminutives (-je, -tje, -pje): always het. See the rule

This word is not in the word lists we use to double-check answers.

How to use offertetje

the offertetjehet offertetje
this offertetjedit offertetje
that offertetjedat offertetje
our offertetjeons offertetje
your offertetjejouw offertetje
every offertetjeelk offertetje
which offertetje?welk offertetje?
a big offertetje / the big offertetjeeen groot offertetje, het grote offertetje