These are sheets that are twice as wide as a single page, folded along the spine, and traditionally sewn together.
Kinds of Notebook:
SIZE: Standard sizes, 8-3/8 x 5-3/8
NUMBER OF LEAVES
INK COVER : 1 COLOR, CMYK,
INK CONTENT: 1/0 or 4/0
PAPER COVER : Bristol, C2S#220, Foldcote
PAPER CONTENT : From Book #40