These standards are especially characteristic of the belt type, whether flat, V or drive belt, and the manufacturer. Common measurements include: V-Belt Sizes: Width: from 4mm to 25mm (or more depending upon the application) Length: 600mm to 4000mm Profile: A, B, C, D, etc. Flat Belt Sizes: Width: 10mm to 300mm Length: Sizes specific to the system For size constraint and... https://www.technicalsewa.com/spareparts