C-Thru Rule French Curve Set. Set of eight transparent plastic curves with inking edge useful for making an infinite number of designs. 6 inch, 6-1/4 inch, 7-1/4 inch, 8-1/4 inch, 8-1/2 inch, 8-3/4 inch, 10-1/4 inch, and 10-1/2 inch.