The Basketball Hoop - Suction Cup makes it easy for you to shoot hoops while at work. The suction cups stick to most smooth surfaces (glass works best), so you can stick it to your office window, your office door or maybe even your office wall. This basketball hoop comes with a soft foam ball that's perfect for squeezing and tossing. Plus it won't hurt in the rare case you miss a basket and accidently hit your boss! 8.5 inches in diameter.