Łapka w dół and other 80,800 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
Its a hand making a thumbs down sign. The hand is somewhat rectangular and the thumb pointing down is at about a twenty-five degree angle. The index finger and pinkie are approximately the same size, and the two middle fingers are the same size as each other.