It comes in 2 different memory sizes 16 and 32.
The price for 16 GB with $69 nexus protect service would be $448 +Tax, and without protecting service it would be just $379+ Tax.
And
The price for 32 GB with $69 nexus protect service would be $498 +Tax, and without protecting service it would be just $429+ Tax.

The all-around champ is back....
Capturing the soul of the Nexus family, the 5X offers top-line performance in a compact, lightweight device that's ready to go anywhere, anytime. Beneath the 5.2-inch display is a hexa-core Snapdragon 808 processor for world-class speed at an affordable price.
Dimensions
147.0 x 72.6 x 7.9 mm
136 grams
Display
5.2"
Corning® Gorilla® Glass 3
Battery
2700 mAh Battery
USB Type-C for fast charging
Camera
Rear: 12.3
Front: 5 MP
Processor
Qualcomm Snapdragon 808 processor, 1.8 GHz hexa-core 64-bit
Adreno 418 GPU.