It's a women's XS. I wore it when a girl's size 150 fit just right. I'm listing it as size 150. It's stretchy cotton skinny pants. The color is black. It's been used and washed frequently, and the care tag is faded. It has a used feel, and I'm listing it in poor condition. Basic design, good for writing practice or when you don't mind getting dirty! Due to shipping costs, I can't go below 300 yen. It's used clothing. Thank you for looking. Size: XS (SS) Size: 150cm