Y-3 RIVALRY STATEMENT RIVALRY-INSPIRED SHOES BY Y-3. The Y-3 Rivalry Shoes rewrite the modern fashion code and build on the foundation of one of the most influential basketball sneakers of the '80s — the adidas Rivalry. They stay close to the original and add a refined B-ball twist, with a smooth leather upper and leather 3-Stripes on the The sizing guide says 8 women- I would say more like a 9