For measuring and comparing V belts to one another, etc, a cheap easy way out is to get a seamstress cloth tape measure. Some are about 1 inch wide and little easier to use as compared to the 1/2 wide ones and you can take two and add to the length if desired, but not really necessary, just keep on measuring and adding if over 120 inches long. They measure the OD length easily because being very flexible and wide they lay on the V-belt good. (and you can also get the ID easily if desired) I keep my cloth tape hanging up readily available by the V-belts hangers.
They cloth type measuring tape can even be found at Wal-Mart or any hobby shop.
I suspect that UPE Group banned me as a buyer after I pointed out nicely to them of their same part number V belts of different lengths listings needs corrected, is they knew they most likely they could not easily correct their listing info or answer my question in a logical manner, and knowing I would eventually receive a wrong size belt after I had reported their listing discrepancies it was easier for them to block me as a buyer, but again sometimes a guy just runs into a disgruntled employee that does not care about the company they are working for or is headed on down the road anyway.
Public Relations Dept weak.