Idea of Exterior Icon
The icon is the shape of a rectangle with the top line missing to complete it. The top of the rectangle is complete by a partial triangle with no bottom side to it. Inside the rectangle is a square at the upper left corner and another rectangle at the bottom right.
This Exterior 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 6,200 icons, all in the same style and quality.