This top is designed as one size: the wrap cut ties and adjusts to your body, not the other way around.
The fabric has controlled drape and stretch, and the halter knot lets you fine-tune neckline and support. It fits comfortably from EU 34 to 44 — tested on all those bodies before production.
Worried it won't fit? It's the most common doubt and the one that comes true the least: the vast majority keep it. And if it's not your case, you have 30 days to return it for free.