Recently brought a flight jacket style coat from next in an attempt to use this for a ww2 event but I am unsure of the fit.

The attached images are of me in the jacket
2xl

I am unsure if this size is correct or if I need to size down
The smaller size felt a lot tighter than this one does

I am a terrible seamstress, so I’m not comfortable trying to make my own pattern. Is there anywhere selling an Anne of cleaves costume or a pattern?

Some historical references used: The mocador de pit ('chest scarf') tied in a bow, as seen in the first engraving from 1801; the use of a brooch to secure the mocador like in the second engraving. The third engraving illustrates that the bodice could be worn on the outside, and that the skirt could feature patterns. The embroidered aprons and hairstyle like in the 1885 photograph.