This is a square but the top line has not be drawn. Originating front the center and going up is a arrow who's bottom of its head is equal to the top of the sides of the square
This is a Level Up 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 13,900 icons, all in the same style and quality.