What size are NIPS Poster Boards at the Main Conference?

The poster boards are in landscape 

Width 1,93 meters x Height 0,91 meters

or 6.33 ft x 2.9 ft. 

What size are Posters in Workshops?

There are no poster boards at workshps. Posters are taped to the wall.

The poster size is 36 x 48 inches or 90 x 122 cm.