In shaping moulding there are three degrees of convexity:
• 1/4 convex - ovolo (7)
• 1/2 convex - torus (12)
• 2/3 convex - astragal (1)

The ovolo is commonly seen on antique mouldings carved into an egg and dart pattern.The torus could be shaped into a leaf pattern.The astragal is usually shaped in a bead, pea and sausage or a rope pattern.

Only two degrees of concavity are common in moulding:

• 1/4 concave - cavetto (3)
• 1/2 concave - Scotia (9)

Other sections include:
• Frieze (5) - a flat section between the back and the front of the moulding
• Taenia (11) - a narrow flat strip
• Corona (4) - an area overhanging the front of a moulding
• Sight edge (10) - the innermost edge of the moulding
• Back edge (2) - the outermost edge of the moulding
• Rebate or Rabbet (8) - a rectangular groove cut to receive the artwork package