Sizing: Standard running shoe lengthHeel: Medium to narrowMidfoot: Medium volumeForefoot: WideToe-Box Height: MediumArch Structure: MediumShoe Shape: Semi-Curved TheTopo Athletic UltraFly has a 5mm heel-toe offset and built in support for mild overpronation. The low offset is great for midfoot or forefoot running styles.*Runner’s World is a registered trademark of Rodale, Inc. All rights reserved.