Drawing any curve is possible with a set of Westcott French Curves! These crystal clear curves are made of .080" (2 mm) thick plastic. They range in size from 6" to 10½". Note — Formerly known as C-Thru, the products you receive may be labeled with either the Westcott or C-Thru brand name as C-Thru company makes a transition to new ownership. Rest assured, the quality, features, and fabrication will remain the same.