I checked whether the size is your body or the garment and it said body size.
How can 33-34 inch waist be a size 10 and Small?
I have a 25cm waist. I am slim. I am NOT less than XXS!
I have a couple of their tops in Small. They fit fine - a bit short on the arm (I am tall).
Anyone got bottoms/shorts? I was going to go for a 10, which is usually a safe bet.
Image attached - will need to be approved, be patient!