This is a picture of four pieces of paper or notes that are stacked on top of each other. you can see the outline of the three on the bottom, while being able to see the full piece of paper on top
This is a Sheets 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 13,300 icons, all in the same style and quality.