This is a Unit 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 12,600 icons, all in the same style and quality.
It's four small squares, each sitting on the corner of one large square. The small squares are connected by the sides of the big square, giving it a connected look. Three of the four small squares are not shaded in and the only square that is shaded in is the small square on the bottom left hand corner.
Related to Unit Icon
Related icons are the icons with matching tags, as well as all business icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors