Colonial Base CB207/16″ x 2-3/4″ Standard CB213/8″ x 2-3/4″ Non-Standard CB223/8″ x 2-3/4″ Standard CB233/8″ x 2-5/8″ Non-Standard CB247/16″ x 2-3/4″ CB307/16″ x 3-1/4″ CB317/16″ x 3″ Non-Standard CB323/8″ x 3-1/4″ CB337/16″ x 3-1/4″ Non-Standard CB343/8″ x 3-1/4″ Standard