It was hard to watch.

But we now know how long NBA All-Star Paul George's recovery is going to be from that gruesome leg break...

Doctors estimate a full recovery could take up to 18 months after he needed surgery for an open tibia-fibula fracture in his right leg.

George is expected to remain in the hospital for about three days.

The 6-foot-9 forward suffered the injury late in the U-S national team's intrasquad scrimmage Friday night.

(Photo: Ethan Miller / 2014 Getty Images)