This Wyjście icon is made in Material Design style developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 4,300 icons, all in the same style and quality.
Consider a square with some part missing at the middle of the right side. There is an arrow pointing towards east or right side for which the tail starts from the center of square and head of arrow begins at the missing part on the right side of square.