It shows the heel and the ball of the left foot with a curved arch in the middle. It shows the five toes as circles above the ball of the foot. The big toe is a bigger circle, and they get smaller as they go to the pinkie toe.
This is a Footsteps icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,700 icons, all in the same style and quality.