We knew they were coming, but now we know what they look like, too.

Images of Facebook and Ray-Ban's smart glasses, scheduled to launch on Sept. 9, were posted on Twitter by leaker Evan Blass. Judging by the pics – and there are a lot – the smart glasses are coming in at least two basic designs and in several colors.

The design is fairly standard Ray-Ban fare; one model would probably be indistinguishable from Ray-Ban's Wayfarers unless you looked closely. Two things give the "smart" nature of these glasses away: the cameras tucked into the upper corners of the front of the frame, and slightly thicker arms, which probably host chips, speakers, mics and the like.

In one of the leaked photos, you can see the accessories you probably get with the glasses, and they include a charging cable, a case, and a carrying bag.

Facebook CEO Mark Zuckerberg said in July that the smart glasses are coming soon. He also said that they'll let users do some "pretty neat things," though he didn't elaborate on what those things are. And a few days ago, Ray-Ban posted a teaser for the launch, which is scheduled to happen later today. Finally, Zuckerberg recently posted a few first-person videos which may have been taken with the smart glasses.

Other than that, and beside the obvious (cameras!), we don't know the specs for the upcoming smart glasses. But at least we won't have to wait too long to find out.