Wish I had a head scratching smilie. Could uses it now.No, V belts are sized by the outside circumference. You turn them inside out to use a belt sizer. The width should be the same as the wide part of the pulley. A V belt should never run in the bottom of the groove. Length could be estimated by the distance center to center of the pulleys + 1/2 the circumference of both. 5.89 + 3.93 + the C to C distance.