These plastic curves are great for detail work. They are heavy enough not to warp but flexible enough not to chip or crack if dropped from a tabletop.
The set, pictured above, includes the 5-1/4" French Curve, the 6-1/4" French Curve, the 10-1/4" French Curve, and the 10-1/2" French Curve. The 5-1/4" size does not have an inking edge. The other three do have inking edges.