This particular icon has three square boxes that are positioned on top of each other. On the side of the boxes are long lines. There are two checkmarks in the first two boxes at the top.
This Checklist icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest
Microsoft Office, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,700 icons, all in the same style and quality.