Overheating issues

Ok so I drove the car today for about 45 minutes and it did not overheat, but, the temp was up pretty high when I came to a stop light or in traffic. I checked the size of my crank pulley and it was approx. 6 1/4" wide and my fan pulley is approx. 6 7/8" wide. I know that the fan pulley should be smaller than the crank pulley, but I am having the hardest time finding a fan pulley that measures less than 6 1/4" x 2 3/4" deep. Can anybody here steer me in the right direction to find such a part?