2011 LV LX Front Door Speakers Size

[briskey_b]

I recently had a front speaker blow in my current car, a 93 Magna and I'm looking to replace it with something quality. Currently I have 5 and quarter inch speakers in the front but would be willing to change if anyone knows the size that comes in the 2011 LV LX. I'll be buying it off my parents in about a year's time when they get a new car and would rather transfer the improved speakers across rather than sell them. It has the Sony head unit and what I'm guessing is Sony Xplodes in the doors, but my parents aren't keen on me pulling the door panels apart to have a decent look. If anyone knows I would be most grateful.