Ceylon C4 Cinnamon grade falls under the Continental Cinnamon grade. This Continental cinnamon grade-C4 size is 13-14 mm in diameter. The C5 Cinnamon Special grade is one of the best cinnamon grades. You can buy cinnamon C4/C5 grade in a variety of cut sizes. For example, 5 inches, 10 inches, or 21-inch cinnamon cuts.
