Please check the size guide here. Attack your runs with confidence, while also enjoying maximum comfort and responsiveness when you run in the Nike Zoom Rival Waffle. You'll get just the right amount of cushion from the lightweight, responsive cushioning and your feet will breathe easy in the dual layer mesh upper that offers excellent ventilation. Your every step will feel locked down and well-supported in the Flywire technology, and you'll be digging' in like you mean it, no matter what the surface, thanks to this Zoom Rival classic Waffle outsole.