Roman Empress Costume

How can we get this toga in a plus size 1X?

I ordered this in large and xl. they are both the same size! a size too small. how can i get an xl?

I’m 5’5 and 175 pounds what would be the best size for me?

I'm 5'3" and 105 pounds, would a small (6-8) be too big? Currently there's no XS available.