It was a mini moon, aka micro moon!
The useful site Time and Date explains:
Contrary to popular belief, the Moon orbits the Earth in an elliptical path, with one side of the path closer to the Earth than the other. The point closest to the Earth is called the perigee, while the point farthest from the Earth is known as the apogee. The average distance between the two extreme points is 237,700 miles or 382,500 km.
When a full Moon coincides with the Moon’s position at apogee, it is referred to as a Micro Moon or a Mini Moon.
Sometimes also called an Apogee Moon, a Micro Moon looks approximately 14 percent smaller, and around 30 percent less bright than a Super Moon.
The last Micro Full Moon occurred on November 28, 2012.
(For SkyWatch Friday.)