Row Chart Showing the Number of Foot Rows Required for a Specific Foot Length when Knitting the foot on a Circular Sock Machine. The row chart is cylinder specific. This row chart is for a 64 slot cylinder. This is an instant download of a digital file (.pdf format) for the images shown above. The Circle Diagram shows the number of needles to be raised out of work when making the heel (or toe) for various cylinder slot sizes. Calculations for the number of foot rows in the row chart are based on the circle diagram. The downloads are .pdf format and are 8 1/2 inches by 11 inches in size. Your files will be available to download once payment is received. Since this listing is delivered via instant download, no refund can be issued. The large red number on the chart is used to identify the cylinder slot size for Etsy listing purposes only. This number will not be printed on the charts you receive. The Row Chart is $1.59