Zimmermann Floral Print Dress Size 1

I just purchased this dress, and it’s in perfect condition and appears as if it’s never been worn. It’s stunning, and I love the brand. Most of their linen dresses are over $1,000 new. A size 1 in Zimmermann - made in Australia - is equivalent to a size 6 US. I typically wear a 4-6, and my waist is relatively small. This was just too tight for me in the chest and waist. (I’m a 34C.) I would say it fits more like a US size 2-4.