This icon is a part of a collection of Koszykówka flat icons produced by Icons8. Icons follow the guidelines of iOS, Windows, and Android and are designed by a single designer, guaranteeing the consistent quality. Both PNG and vector are available.
This is a very simple icon of a basketball. It's made of a medium sized circle with curved lines running through the middle. These lines are curved in such a clever fashion that they clearly show the center of the ball belling out due to the air inside of it.