Have you looked at the CX-5 specifications lately? 16" brakes!

[Orangutan]

That's huge! I'm assuming this is just a typo. (boom06) Hahaha.

http://mazdausa.com/MusaWeb/displayPage.action?pageParameter=modelsSpecs2&vehicleCode=CX5

Chassis
Brakes 4-wheel disc, diagonal hydraulic
- Front 16-inch vented disc
- Rear 16-inch solid disc

For comparison, the largest and heaviest Mazda in America, the CX-9, uses 12" rotors:

http://mazdausa.com/MusaWeb/displayPage.action?pageParameter=modelsSpecs2&vehicleCode=CX9

Chassis
Brakes 4-wheel disc
- Front 12.6-inch vented disc
- Rear 12.8-inch vented disc

 

[Canadian-ES-GT]

Thats a typo

From the Canadian web-site:

Front: 11.69-inch
Back: 11.93-inch

http://www.mazda.ca/MciWeb/displayPage.action?pageParameter=modelsSpecs&vehicleCode=CX5