Wire gauge size for power windows?

Hey guys, I am looking for recommendations on what gauge wire to use for my power windows. The motors I am using are from a 88 Ram and are the small Delco motors. The leads coming off the motors seem to be 16 gauge at most. I will be using relays inside the doors to take the load off the switches. Do you think 12 gauge wire to the relays is good or is it overkill.
Thanks Mike