Help with Toro belt size

[DJL50]

I ran across a guy who has a large supply of mower belts he is selling for $10-$15 each. They only give the actual size of the belt (IE-3/8 x 72") I looked on the belt from my Toro Z but it only gives the part number as well the part number only in the manual. Is there a place on the web that will give me the actual belt size if I have the part numbers? My mower is new but like to pick up a few at this price to have on hands.

Toro 106-7369 or Carlisle part number 7-8160 (this belt is like $85 from Toro)

Toro part 107-3959

[FIXDISS]

If you can't find printed resource you can take a spare belt by your auto parts dealer and they can get dimensions from their belt sizing tool.Otherwise you might try crossreference guide from Toro to maybe Gates belt via internet to see if they give dimensions.

[FIXDISS]

Enter make,model and serial # and maybe we can reference thru a supplier.