Well you are in luck. We make two sizes of mud flaps for the Toyota Tundra and have sold many sets of both sizes to happy RokBlokz owners.  The XL flaps actually stick out on the outer edge about 4 inches, whereas the Original size are only about 1 inch past the fender.

The key here is your wheel setup. If the wheels do not poke out more than 1" past your fenders, the Original size should be a good fit.