Debbie Cosplay Pattern Search

[u/PadawanCinderella]

I am attempting to find a plus size (2x or US W 20) dress pattern that would look similar to Debbie Jellinsky's first outfit in Addams Family Values.

So far I have found similar overall dress patterns, but none of them include the plunging neckline or folded collar, which are essential to me.

I have searched Etsy, Ebay, and even Walmart. Help!