My latest trick.

[Shvegel]

Needed to order a Vee belt for my alternator with AC and wanted the alternator to sit tight to the thermostat housing.  I came up with what I think is the perfect measuring tool.  I used a 1/2” (13mm) plastic banding strap and cut it to the exact length which was 31” or 787mm.  I ordered the closest belt at 785mm and it fits like a glove.  The banding strap was perfect because it fit the sheaves without sliping around and doesn’t stretch at all.

[EeVeeWee]

Very smart!