You have the sameone I have Standard Bed 6.5 ft.

Bed length 78.7
Bed height 22.2
Bed width (total/between wheelwells) 66.4/50.0

 

C/M's come with the 5'5 bed. Ditto from what TRD-X said, that's standard unless you have a loooooooooonnnnnnnggggggg bed!