Sizing: Standard running shoe lengthHeel: Medium to narrowMidfoot: Medium to low volumeForefoot: MediumToe-Box Height: Medium to lowArch Structure: MediumShoe Shape: Semi-Curved The New Balance RC1400 v5 is a versatile road racing flat. Its responsive, yet cushioned ride makes it a great option for uptempo workouts, interval training, or road racing over any distance.