It is important that book descriptions are applied consistently; for that reason, Ouble Books & Magazines uses this Scale of Quality, loosely based on standards widely accepted across the industry.
As New - The book is in the same immaculate condition in which it was published. There are no defects, no missing pages, no library stamps, etc., and the dustjacket (if issued with one) is perfect, without tears.
Fine - Approaches "As New", but without being crisp. There are no defects, etc.; if the jacket has any defect, this is noted.
Very Good - A used book showing some small signs of wear - but no tears - on either binding or paper. Defects are noted.
Good - Describes the average used and worn book that has all pages or leaves present. Any defects are noted.
Fair - A worn book that has complete text pages (including maps or plates) but may lack endpapers, half-title, etc. Binding, jacket (if any), etc. may be worn. Any specific defects are noted.
Poor - So tatty that its only merit is as a reading copy because it does have complete, legible text. Missing maps or plates are noted. Copy may be soiled, scuffed, stained or spotted and may have loose joints, hinges, pages, etc.
Ex-library - Always noted, whatever the condition.
Book Club - Always noted, whatever the condition.
Dustjacket - Lack of dustjacket is noted if the book was issued with one.
Price clipped - Always noted.
*Standards first applied by AB Bookman's Weekly, 1949