going with two 10 X 8 doors on our garage. The truck measures right at 7' at the back (w/ topper) and is almost 9' wide (w/large mirrors). We also have a slight incline to get into the garage (w/small flat apron). THANKS for all the replies. It will still be several months before I can put the Truck inside for the first time : )

For a regular size truck the 10 wide by 8 high is pretty good. but if you plan on getting anything bigger in the future cheaper to make at least one door a 12x12. bigger is always better. but a 10x8 is good size for normal size garage most high end houses are going to that size.