LG Q6 Plus dimensions are 142.5 x 69.3 x 8.1 mm (W x H x D).
Yes, LG Q6 Plus does have the face recognition. You do not even require to power up your phone. It's camera automatically detects your face and unlocks the phone more quickly than typing, drawing or fingerprinting.
Yes, LG Q6 Plus does have the Corning Gorilla Glass.
Yes, LG G6 Plus does support VR. It has the Gyroscope sensor.