This Happy Mac 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 15,500 icons, all in the same style and quality.
The image is of a square with a face inside of another larger square. The face has two eyes, a nose, and a smiling mouth. Underneath both squares is a smaller rectangle that the bigger square is sitting on.