Sizing: Fits small; purchase 1/2 size larger than standard running shoe lengthHeel: MediumMidfoot: Medium volumeForefoot: MediumToe-Box Height: MediumArch Structure: MediumShoe Shape: Semi-curved The Skechers GOtrail Ultra 4 is a maximal trail running shoe that can be used on a variety of trail surfaces. The shoe is a great option for the runner who wants versatile traction and the highest level of cushioning.