The extant folios are gathered into 38 quires. Sheets of parchment were folded to form quires from which book-form codices were fashioned. A bale consists of 5 bundles, 10 reams or 200 quires. A bundle consists of 2 reams or 40 quires. The manuscript measures , with hundreds of vellum pages collected into 18 quires. This density is additional evidence that the quires containing these texts were separate booklets. Most of the quires or signatures contain four sheets, save two containing five. The manuscript contains two quires of twelve leaves each. Some paper manufacturers counted 546 sheets (21 quires of 26 sheets). The leaves are arranged "in quarto" (four leaves in quires). The original arrangement of the quires cannot be recovered. The first step is to set up the quires. The miniatures in the intermediate quires must therefore be attributed to other illuminators. The pages are formed by quires of 8 pages folded (Birch, 64, 67). The number of the quires is often found in the margin.