Size 1. I believe I bought this sometime this year. This is the same material as Beardsley's standard waist rib denim series. It doesn't have a rib at the waist, just elastic. I bought it because I thought it would be easier to wear with short tops since it doesn't have a rib, but I'm 162cm tall and it's a little short for me, so I'm selling it. I wore it twice.