This free social network puzzle piece free icons set is extremely versatile; it can be used as stand alone icons or just like a real puzzle, all puzzle pieces interlock together to create seamless backgrounds or other graphical elements. The free Social Puzzle Icon Pack includes 72+ 64 pixel x 64 pixel icons, 72+ 96 pixel x 96 pixel icons, and 72+ 128 pixel x 128 pixel icons all in transparent PNG format.