Proper shoe shape in running shoes is important for a correct
shoe fitting. Select a shoe that conforms as nearly as possible to the shape
shoe fitting. Select a shoe that conforms as nearly as possible to the shape
of your foot. The ball of the foot should fit at the widest part of the
shoe. This is where the shoe is designed to flex. The "last" of the shoe is
the model on which the shoe is built. There are three types: straight,
semi-curved, and curved. Each shoe company works from a specific last -
their last may match your fit more closely. Don't purchase shoes that feel
too tight, expecting them to stretch to fit. Your heel should fit
comfortably with a minimum of slippage.