The size of books has been used in collation for material cataloged since January 1948. In giving the size, follow AACR2, rule 2.5D. Remember to round up to the next whole centimeter (e.g., if the spine measure 28.2 cm., record it as 29 cm.) Measure the height of the binding if the volume is bound. Otherwise, measure the height of the item itself. Call number prefixes relating to size are placed at the beginning of the classification number, but following other prefixes.
Cataloging Department, September 1, 1939
Revised August 1948, November 1973, June 1983, May 2