Small-Series (usually 6 1/2″ x 4 1/8″, up to 3/4″ thick)
Small-Mass (usually 6 3/4″ x 4 1/8″, up to 1 1/4″ thick)
Medium-Trade (usually 8″ x 5 1/8″, up to 1″ thick)
Medium-Thick (usually 8 1/4″ x 5 5/8″, up to 1 3/4″ thick)
Large-Hardback (usually 9 1/4″ x 6 1/4″, up to 1 1/2″ thick)

