This shape's bottom and sides are dotted lines that make up the a square. But at the top, there is an arrow instead of the rest of the dotted lines. The arrow points upward.
This Structural 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 6,000 icons, all in the same style and quality.