- Tail See Foot.
- Tail-piece Ornament or decoration at the end of a section or chapter of a book. See Head-piece; Vignette.
- Text block The book, sewn and trimmed, though unbound.
- Three-quarter cloth A book in which the spine and corners are covered with wider cloth, the rest of the sides with paper.
- Three-quarter leather A book in which the spine and corners are covered with wider leather, (calf, morocco, sheep), the rest of the sides with cloth or paper.
- Tipped-in Any matter which is lightly attached (gummed or pasted) to a sewn-in leaf (or paper stub) of the book.
- Tissue Thin sheets of paper tipped-in into a book to absorb ink from plates and thus prevent offsetting onto facing pages. See Offset.
- Tooling A decoration on a binding, in blind or gilt, impressed by hand using a special tool. See Blocking.
- Top edge gilt (t.e.g.) The top edge of the book is coated with gold.
- Turn-in See Dentelle.
- Unbound A book, probably a pamphlet, which has never been bound. See Disbound.
- Uncut The leaves of the book have untrimmed edges and are rough and uneven. See Unopened.
- Unopened The folded edges of one or all signatures of a book have not been cut open to allow reading.
- Vellum See Parchment.
- Verso The back of a leaf (the left-hand page of an open book). See Recto.
- Vignette An ornament or a small picture used as decoration on the title page or as a head- or tail-piece. Also, any small illustration not enclosed in a border.
- With all faults Refers to an item, often suspected to be incomplete and in a state which would not allow a proper collation, for which the right of cancellation of the sale does not apply. See Not Subject to Return.
- Wood engraving A relief printing process in which the lines are incised across the end grain of very hard wood. Achieves a much more delicate and precise result than a Woodcut. Woodcut A relief printing process in which the lines are carved on the plank side of the wood, with the grain.
- Working copy The humblest term in the vocabulary of condition. (Carter).
- Wrappers The paper binding of a book. A paperback is bound with thick wrappers. Also known as Wraps.
- Yellowed The discolouring of paper matter towards brownish yellow, caused age or acidity.
- Fine Fine, little-used book with no defects. Older books, however, may show minor flaws.
- Very Good A used book with some signs of wear, though not exceptional or obtrusive.
- Good No longer very good. Has been used intensively, shows obvious flaws or defects.
- Fair Worn but complete.
- Poor A binding-, reading-, or working copy only.
Book Sizes (English & Metric)
All sizes are approximate
- Duodecimo, 12mo
7.5" x 4.5" or 19cm x 11.5cm
- Ooctavo, 8vo
9" x 5.75" or 22.8cm x 14.7cm
- Small Ooctavo
6.5" x 4.5" or 16.5cm x 11.5cm
- Crown Ooctavo
7.5" x 5" or 19cm x 12.7cm
- Royal Ooctavo
9.25" x 6.25" or 23.4cm x 15.6cm
- Quarto, 4to
12" x 9" or 30.5cm x 22.8cm
- Crown Quarto
10" x 7.5" or 25.4cm x 19cm
- Royal Quarto
(13" x 10" or 33cm x 25.4cm
18" x 12" or 45.3cm x 30.5cm
- Small Folio
15" x 9" or 38cm x 22.8cm
- Imperial Folio
22" x 15" or 55.6cm x 38cm