The codex consists of parchment, originally in double sheets, which may have measured about 40 by 70 cm. The whole codex consists, with a few exceptions, of quires of eight leaves, a format popular throughout the Middle Ages. *T. C. Skeat, Early Christian book-production, in: Peter R. Ackroyd & Geoffrey William Hugo Lampe (eds.) The Cambridge history of the Bible (Cambridge 1975), pp. 77–78.