Anyone know where to find a chart to convert a 4-1/4" x 7/8" pulley to 1vp44 x 7/8.

Or to put it another way, say you measure the pulley with your measuring tape and its 4-1/4 x 7/8. The supplier will then say its a 1vp44 x 7/8.

Would be nice to have the chart.